The world’s biggest PC games are fighting a new surge of cheaters and hackers
If you’ve ever played a PC game that has a competitive element, you’ve probably played against a cheater. Whether it’s that sniper bullet that felt a little too accurate, the person teleporting around the map, or the opposition that just somehow knows which angle you’re about to peek from every single time. Some of the world’s most popular PC games are now fighting back against cheaters in new and interesting ways — just as cheating becomes an even bigger problem.
The developers behind Call of Duty: Warzone, PUBG, and Destiny 2 have all announced big pushes to respond to cheating in recent weeks. The hottest game on Twitch, Valorant, isn’t even out yet, and cheating is already a problem that needs to be addressed.
Cheating in PC games isn’t a new phenomenon. Game hacks and cheat software have been around as long as PC games have existed. Aimbots automatically lock onto opponents’ heads, so cheaters can fire and immediately win a battle. Wallhacks expose everyone on a map so cheaters get a huge advantage of knowing when you’re about to push a point or turn a corner. There’s even lag switching, which mainly affects peer-to-peer games, allowing cheaters to stutter around a map and become very difficult to hit.
Aimbots and wallhacks are the most common forms of cheating in online shooters, allowing people who are new to a game or simply at a lower skill level to get a huge advantage over other players. Some cheats are the obvious type, where a player is flying around a map at an impossible speed or firing a gun faster than anyone else. Others, like wallhacks, are far less obvious, and often go undetected in games for weeks or even months.
There’s a constant cat and mouse game between developers and communities that create and sell mods and cheats for games. Cheaters often purchase tools that act like malware, hacking and injecting a game with specialized code that will change how it works. These tools have gotten increasingly complex in recent years, with whole underground communities and forums dedicated to ensuring aimbots and wallhacks remain undetected for monthly subscription fees. A PC Gamer investigation back in 2014 warned that some of these cheat providers could be making millions of dollars per year, and some cheat developers now claim to sell specialized tools for hundreds of dollars a month.
The cat and mouse game has intensified recently during a pandemic that’s helped Steam break its all-time concurrent user record multiple times in recent weeks. The perfect storm of more people looking to play games and find cheats has been met with new titles like Call of Duty: Warzone and Valorant, alongside plenty of existing battle royale games. Developers are now looking to increasingly unique and controversial ways to prevent people from cheating.
Infinity Ward is matching suspected Call of Duty: Warzonecheaters against each other in a virtual battle of whose wallhacks and aimbots are more sophisticated. More than 70,000 cheaters have already been banned, and Infinity Ward says it has a “zero tolerance for cheaters.” Respawn Entertainment, the maker of Apex Legends, has also been struggling with cheaters and hackers recently. After banning more than 350,000 cheaters a year ago, hackers have figured out how to bypass hardware ID bans from the Easy Anti-Cheat software that Apex Legends utilizes.
PUBG has similarly spent months trying to respond to cheaters. “Last year, we spent time working on various measures to block cheat programs,” explains Taeseok Jang, executive producer of PUBG PC. “Most of these actions focused on blocking cheat program developers to make it more difficult for them to create these highly lucrative cheats.” PUBG is now improving its code to protect against manipulation but admits that cheat developers continue to “excel at adapting to our measures.” PUBG utilizes BattlEye, a self-confessed “anti-cheat gold standard” that hasn’t been enough to counter cheaters in the game.
Other games like Overwatch and Destiny 2 are also seeing competitive games riddled with cheaters. “Cheating in Destiny 2 is up roughly 50 percent since January,” admitted developer Bungie in a blog post addressing the issue last month. Bungie recently reintroduced its competitive Trials of Osiris mode, and cheaters have become a huge issue on PC since Destiny 2went free to play around six months ago. Much like other games affected by cheaters, there’s growing community anger over Destiny 2’s cheater problem, with developers slow to respond. I play Destiny 2 far too much, and not a day goes by without noticing a cheater in the game. One Destiny 2 cheater even got caught using wallhacks live on a stream recently and was quickly banned.
Blizzard started detecting Xion and Pentagon aimbot tools for Overwatch around six months ago and promised “major things in the next two patches going in to address anti-cheat” back in January. Some community members have even turned into virtual sheriffs to police Overwatch. The “Overwatch Police Department,” infiltrates cheating networks to find the latest hacks to get them shut down. It’s a hobby for those involved and part of the ongoing battle to stop cheating.
As many of these games are free to play, game developers also have to balance the ability for cheaters to simply create a new account if they get banned. That’s increasingly difficult for the popular battle royale games that are purposely designed to make it quick and easy to jump straight into a game with a new account.
Even PC games that are still thriving after almost a decade aren’t immune from a wave of hacker attention. Valve has also been battling a big increase in cheaters in Counter-Strike: Global Offensive since the game went free to play more than a year ago. Valve, like many others, has invested heavily in anti-cheat efforts, using its automated Valve Anti-Cheat (VAC) system to detect cheats installed on computers. Valve has also created other methods to tackle CS:GO cheats, including a system where experienced players could serve as virtual jurors to review suspected cheaters and regulate the community.
“Eventually we realized that cheating itself was a goal for some users and they were going to return no matter how many of their accounts we banned,” says John McDonald, senior software engineer at Valve, in a statement to The Verge. “Starting in 2019, CS:GO converted to using Steam Trust which leverages deep learning and all of the data on Steam to do an even better job of identifying the likelihood that an account was going to cheat, even before the very first time that account interacts with other players, whether those accounts are free-to-play or premium users. We’ve rolled out Steam Trust to several partners and expect to do a broad release to all Steam partners later this year.”
There are controversial ways of dealing with hackers arising, too. Riot’s new shooter, Valorant, isn’t even out of beta yet, and cheats have already been developed. Riot has created a controversial anti-cheat engine for Valorant, that it also recently announced may eventually come to League of Legends. It involves a kernel-level driver that’s always on, even when the game isn’t running. Fans raised fears over privacy and security, and Riot has had to provide more control over how its Vanguard anti-cheat software works. You can now disable the software, but it will prevent you from playing Valorant until you reboot.
The ongoing hacking back-and-forth is very similar to how malware is developed for PCs, with cheats using methods to tamper with games and inject themselves into memory. At the heart of the PC gaming issues is Microsoft’s Windows operating system. It’s the platform that the vast majority of PC games are played on, but its openness allows cheaters to develop these tools easily. There’s no unified or single anti-cheat system that can address the problems across a variety of games, and game developers are forced to use or build systems that are essentially antivirus software.
Some of these systems, like BattlEye, have even caused issues with Windows 10 updates or led other apps to crash on a PC. Microsoft was working on its own “TruePlay” anti-cheat system for Windows 10, but it was limited to the Universal Windows app Platform (UWP) that most game developers have ignored. Here’s how Microsoft described its anti-cheat engine:
TruePlay provides developers with a new set of tools to combat cheating within their PC games. A game enrolled in TruePlay will run in a protected process, which mitigates a class of common attacks. Additionally, a Windows service will monitor gaming sessions for behaviors and manipulations that are common in cheating scenarios. These data will be collected, and alerts will be generated only when cheating behavior appears to be occurring. To ensure and protect customer privacy while preventing false positives, these data are only shared with developers after processing has determined cheating is likely to have occurred.
After briefly appearing in test versions of Windows 10, it has since disappeared. We asked Microsoft about its plans to prevent cheating in PC games, and the company provided the following statement:
“Due to the open nature of the PC platform, cheating in PC games is a complex and varied challenge. The PC ecosystem consists of several layers, such as hardware, the operating system, 1st and 3rd party software, services and more. With that said, we are committed to providing the best experience for players while continuing to ensure that Windows is an open ecosystem supporting a diverse hardware ecosystem, multiple methods to acquire and service games, and supporting multiple technologies and services to analyze, identify and mitigate cheating. We partner closely with industry-leading game developers, middleware, and anti-tamper/anti-cheat services to provide the most robust, end-to-end solutions.”
The vast majority of aimbots, wallhacks, and other cheats simply don’t exist on consoles like the PS4, Xbox One, or Nintendo Switch. The locked-down nature of these systems makes it far more difficult for hackers to gain access and build cheat software. Consoles aren’t immune, as we’ve seen in the past with Modern Warfare 2, but modern consoles have kept most cheaters at bay.
There’s a lot at stake if these PC games don’t address the cheating issues they’re facing. PUBG has gradually been losing active players in recent months, and Destiny 2’s PC player base has fallen behind Xbox One and PS4 after taking over both consoles last year. A drop in player numbers means less revenue for developers who have adopted a free-to-play model, and nobody wants to watch pro players on Twitch face cheaters all the time.
Riot’s complex approach to anti-cheat isn’t the first of its kind, but it’s a sign of where PC games will need to head. Game developers have been slow to respond to cheating, and often, companies refuse to detail what they’re doing at all for fear of providing hackers a heads-up. If a developer reveals an upcoming patch will address cheating, then the cheat creators simply advise their subscribers to stop using the software until they can reverse-engineer the changes and guarantee they remain undetected.
Riot has also been using bug bounty programs to reward security researchers for finding vulnerabilities in the company’s anti-cheat engine. The Valorant developer has increased this up to $100,000 for flaws that undermine the privacy and security of its Vanguard anti-cheat software.
Valorant is still in the closed beta phase, but it will be the title to watch to see if the combination of an aggressive, albeit controversial, anti-cheat system and big security bounties helps keep cheaters away. All game developers are searching for a solution to the same problem that’s growing bigger every month.
On android memory editing, APK modding, data editing, and diverse client-side methods can be used to cheat in online and offline games alike. If a game does not require an internet connection (single player) it will be a lot easier to hack than if it requires internet (online mobile games). Android is currently the superior mobile platform to hack games on, since there is a variety of emulators available and therefore development of cheating apps and tools is incredibly easy. Android is also easy to root and does not require a jailbreak.
The easiest way to cheat in Android offline games is to do it without requiring a rooted physical device, by using modded or hacked APKs. These are Apps that have been decompiled, modded to include cheats (such as unlimited money, god modes, and unlimited gems) and then recompiled as a normal runnable APK file. Another way is to use memory editors to manually change the values in the game, such as, money, gems etc. This technique requires a rooted phone and a memory editor, such as GameGuardian, Cheat Engine + Emulator. Another method of cheating in Android single player games is to use the Google Play Store payment emulators that will emulate payments through the Google Play Store and allow users to get free in-game purchases.
Cheating in online games
Practice of subverting video game rules or mechanics to gain an unfair advantage
Cheating in online games is the subversion of the rules or mechanics of online video games to gain an unfair advantage over other players, generally with the use of third-party software. What constitutes cheating is dependent on the game in question, its rules, and consensus opinion as to whether a particular activity is considered to be cheating.
Cheating is present in most multiplayer online games, but it is difficult to measure. The Internet and darknets can provide players with the methodology necessary to cheat in online games, with software often available for purchase.
Bots and software assistance
Aimbots and triggerbots
An aimbot or autoaim is a type of computer game bot most commonly used in first-person shooter games to provide varying levels of automated target acquisition and calibration to the player. They are sometimes used along with a triggerbot, which automatically shoots when an opponent appears within the field-of-view or aiming reticule of the player.
Aimbotting relies on each players' client computer receiving information about all other players, whether they are visible from the player's position or not. Targeting is a matter of determining the location of any opponent relative to the player's location and pointing the player's weapon at the target. This targeting works regardless of whether the opponent is behind walls or too far away to be seen directly.
Some servers allow inactive players to spectate, watching the game from the viewpoints of the active players. Recording of gameplay actions is also often possible. If someone was using a targeting aimbot, the bot would be obvious to the spectator as unnatural exact position tracking. Some aimbots and triggerbots attempt to hide from spectators the fact they are being used through a number of methods, such as delaying firing to hide the fact it shoots the instant an opponent is in the cheater's crosshair. Some Triggerbot programs can be easily toggled on and off using the mouse or keyboard.
Cheat suites may incorporate these in addition to other features, including adjustments to extrasensory perception (ESP), move speed, ammo count, and player radar. Neophytes[who?] may colloquially define these suites as aimbot programs.
Artificial lag/lag switch
In the peer-to-peer gaming model, lagging is what happens when the stream of data between one or more players gets slowed or interrupted, causing movement to stutter and making opponents appear to behave erratically. By using a lag switch, a player is able to disrupt uploads from the client to the server, while their own client queues up the actions performed. The goal is to gain advantage over another player without reciprocation; opponents slow down or stop moving, allowing the lag switch user to easily outmaneuver them. From the opponent's perspective, the player using the device may appear to be teleporting, invisible or invincible, while the opponents suffer delayed animations and fast-forwarded game play, delivered in bursts. Some gaming communities refer to this method as "tapping" which refers to the users "tapping" on and off their internet connection to create the lag.
The term "lag switch" encompasses many methods of disrupting the network communication between a client and its server. One method is by attaching a physical device, called a hardware lag switch, to a standard Ethernet cable. By flipping the switch on and off, the physical connection between the client and the server is disrupted. The designers of video game console hardware have started to introduce built-in protection against lag switches in the form of voltage detectors, which detect a change in voltage when the switch is flipped. Some manufacturers have taken counter measures to bypass or trick this detector.[better source needed] This can also be achieved by simply unplugging the Ethernet cord going to the client, causing a disruption in the player's internet connection. Other methods, called a software or wireless lag switch, involve using a computer program. In this method, the cheater runs an application on a computer connected to the same network as the client. The application hogs the network bandwidth, disrupting the communication between the client and its server. However, one cannot do this for an unlimited amount of time. At some point, if no traffic is being received, most game clients and/or game servers will decide that the connection has been lost and will remove the player from the game. In some P2P games, it can result in all player lagging or disconnected from the game.
More advanced methods are firewall or router rules that apply bandwidth shaping and network latency, a cheat is able to adjust limits on both bandwidth and latency to stay relevant to a P2P network yet have considerable advantage over other players.
Look-ahead cheating is a method of cheating within a peer-to-peer multiplayer gaming architecture where the cheating client gains an unfair advantage by delaying their actions to see what other players do before announcing its own action.
A client can cheat using this method by acting as if it is suffering from high latency; the outgoing packet is forged by attaching a time-stamp that is prior to the actual moment the packet is sent, thereby fooling other clients into thinking that the action was sent at the correct time, but was delayed in arrival. A partial solution is the lockstep protocol.
World-hacking is a method or third-party program that enables a user to exploit bugs and to view more of a level than intended by the developer.
A common aspect of real-time strategy games is the player's partial limitation or complete inability to see beyond the visibility range of individual game objects that are under their ownership (typically units and structures); this concept is controlled by a mechanism known as the fog of war. World-hacking usually enables the user to bypass this mechanism, either by removing it entirely and/or by rendering objects through the fog that would not normally be visible. In multiplayer modes, this allows for a distinct advantage against the other players who are subject to the intended settings. The advantage gained can be substantial, especially for the average real-time strategy games that rely on the rock paper scissors dynamic to balance out individual objects' varying strengths and weaknesses.
World-hacking may also allow a player to see through solid or opaque objects and/or manipulate or remove textures, to know in advance when an opponent is about to come into targeting range from an occluded area. This can be done by making wall textures transparent, or modifying the game maps to insert polygonal holes into otherwise solid walls. This variation is commonly known as a "wallhack" since it basically allows to the player to see enemies through walls.
World-hacking relies on the fact that an FPS server usually sends raw positional information for all players in the game, and leaves it up to the client's 3D renderer to hide opponents behind walls, in plant foliage, or in dark shadows. If the game map rendering could be turned off completely, all players could be seen moving around in what appears to be empty space. Complete map hiding offers no advantage to a cheater as they would be unable to navigate the invisible map pathways and obstacles. However, if only certain surfaces are made transparent or removed, this leaves just enough of an outline of the world to allow the cheater still to navigate it easily.
Asus released wireframe display drivers in 2001 that enabled players to use wallhacks, announcing the settings as "special weapons" that users could employ in multiplayer games. In a poll by the Online Gamers Association, 90% of its members were against the release of the drivers.
Boosting / Win trading
Players will set up multiple accounts to play against each other. Usually, the primary account will be allowed to win through a deliberate lack of resistance from the secondary account(s) due to those accounts being unplayed or those players agreeing to lose. The major problem with this method is its high cost, as the boosting player must run at least two instances of the program simultaneously, usually on different PCs, IP addresses, and copies of the game. Additionally, some games allow the replays of matches to be uploaded and viewed by others; if the boosting player accidentally allows this, their boosting match can be seen by others. Some players will reverse roles between games, giving each account an equal win/loss record.
Even without match recordings being seen, players who boost can usually be easily identified, since they will have an unnaturally high number of points in relation to the number of matches played.
In games where wins and losses are recorded on a player's account, a player may disconnect when he or she is about to lose in order to prevent that loss from being recorded. This is usually done by activating known in-game glitches or through third-party sources via "IP booting" (a feature of firewall software). Some players do this if they feel their opponent is being unfair. Some games implement a disconnection penalty, usually by recording the disconnect as a loss, a deduction of experience, or even Elo points. Certain games also have a 'disconnect delay' period before the player can disconnect that can last 10–30 seconds. This prevents a player from instantly disconnecting if they are about to die or lose. In some games, if a player disconnects they can receive a warning or even get locked out of online play for a short period.
Rapid Fire Modifications (Macros)
In many games, weapons can be fired in burst fire or single shot fire modes. Modifying a controller or keyboard/mouse to gain the advantage of having a faster firing weapon than the standard player can be considered a method of cheating. These modifications can create an imbalance within the game. In addition to modifying a console or its controller, it is possible to achieve a similar effect on the PC by binding the firing button to the scroll wheel of a mouse, or by using a macro setting that will simulate rapid key presses automatically. However, most games limit the rate at which weapons can be fired, regardless of how fast a player presses the button, in order to limit this form of cheating.
Main article: Exploit (online gaming)
Exploiting is the application of an unintended feature or bug that gives the player an advantage not intended by the game design. Exploiting is generally considered cheating by the gaming community at large due to the unfair advantage usually gained by the exploiter. Most software developers of online games prohibit exploiting in their terms of service and often issue sanctions against players found to be exploiting. There is some contention by exploiters that exploiting should not be considered cheating as it is merely taking advantage of actions allowed by the software. Some players view exploiting as a skill because certain exploits take a significant amount of time to find, or dexterity and timing to use.[further explanation needed]
Farming and stat-padding
In games where achievements and rewards are unlocked by defeating human enemies, especially in unorthodox ways, players may arrange to win or lose against one another in order to obtain achievements without having to play the game linearly. This is also known as stat-padding, swapping, or boosting.
The term farming also refers to the practice of garnering achievements or virtual property for the purpose of real-money-trading. With rare exception, this has no direct effect on the gaming experience of other players; instead, it is a violation of most EULAs and could devalue the virtual property being farmed.
Sharing is when multiple people take turns playing as a single character — mainly in MMORPGs — to gain an advantage by spending more time per day on leveling or farming than an average player would, and consequently having higher stats or better equipment.
Main article: Twinking
Twinking is the act of transferring gear intended for higher level characters to lower level characters that would be incapable of obtaining the gear on their own. Twinked characters have a huge advantage over untwinked characters, as well as the rest of the game world. This is usually used by players who wish to create a new character, either to help them level more rapidly or to gain an unfair advantage in PvP (i.e. player versus player, a type of multiplayer interactive conflict). Most MMORPGs tolerate it, provided that the twinked character is not used in PvP combat against non-twinked characters. Often limits on twinking are placed into the game, usually through strict level or stat requirements to equip the item. Circumventing these level requirements would then be further cheating.
Most games allow other participants to observe the game as it is played from a variety of perspectives; depending on the game, perspectives allow an observer a map overview or attach a "camera" to the movement of a specific player. In doing so, the observer can communicate with an accomplice using a secondary communication methodology (in-game private message, third party communication, or even off-line) to inform friendly players of traps or the position of opponents. An observer can be an active player, using a separate computer, connection and account.
Some systems prevent inactive players from observing the game if they are on the same IP address as an active player, on the grounds that they are probably in close physical proximity; when all players from a single IP address are no longer active participants, they are all allowed to observe. However, this restriction can be easily evaded if there are multiple IP addresses available at one location (a common feature of broadband subscriptions), or if the observer installs remote desktop software on their computer, thus enabling their computer screen to be viewed by select other players in real time.
Additionally, this may be used against players livestreaming to platforms like Twitch to observe the player and their team's position and stats. This is often referred to as stream sniping.
Also known as "teaming or pre-teaming", this form of cheating occurs when two or more players conspire to engage a secret, unofficial alliance of co-operative play to give themselves an unfair advantage over other players. It is considered cheating in many games that have a free for all deathmatch or Last man standing mode. Characteristics of this cheating, in particular, is when players in the same multiplayer server engage in secondary communication between each other using third-party software and/or using remote desktop software to observe the screens of the secret "allies" while one is playing that offers considerable tactical and/or strategic advantages over all other players outside of the "alliance". This type of cheating is very problematic in some games because it is often very difficult to prove as there is no hacking, exploits or game modifications involved, usually requiring the intervention of game server admins to monitor multiplayer sessions in order to catch players engaging in acts of teaming.
Stacking involves altering game settings or team lineups to give one or more teams an unfair advantage over others. One example includes arranging a team composed of skilled or professional players against a team with members of lesser skill. Although this may be a valid and accepted practice in real-life sports, in online games stacking upsets less-skilled players who feel that they aren't being given a fair chance. Less ethical rigging involves weighting the game by providing a player or team with an advantage by outfitting them with better (or more familiar) weapons or equipment, or creating a play field that caters to a certain player, team or playing style. This also may involve creating team-size inequalities, for example a 5 vs 10 match. Many games prevent this by preventing players from joining a team with more players than the opposing side, forcing newcomers to balance the teams.
Scripting is the use of a program or game feature to automate certain actions or behaviors. The use of scripts may or may not be considered cheating, depending on the behavior involved, and whether said behaviour is replicable without the use of such script. A script may give the user unusually fast firing rate, unobtainable otherwise, or may perform seemingly trivial tasks such as reloading. Some scripts can also tamper with other players' systems by spoofing commands.
Implementation of cheats
In the client–server model, the server is responsible for information security and enforcing game rules. (See "Anti-cheating methods and limitations" below for drawbacks.) In the peer-to-peer gaming model, clients run equal code but are still subject to most of the same type of cheats found in the client–server multiplayer model; however, the peer-to-peer multiplayer model has been deprecated in favor of the client–server model with the wider adoption of high-speed networks.
"Never trust the client" is a maxim among game developers (as well as other developers) that summarizes the model of client–server game design. It means that no information sent from a client should be accepted by a server if it breaks the game rules or the basic mechanics of the game, and that no information should be sent to a client unless it is "need-to-know." For example, a server with no rule enforcement or data integrity checking will synchronize all of the clients with all of the information about all of the other clients. The server will be very fast, but any wallhack program will reveal where all the players in the game are, what team they are on, and what state they're in — health, weapon, ammo etc. At the same time, altered and erroneous data from a client will allow a player to break the game rules, manipulate the server, and even manipulate other clients.
Game code modification
Many cheats are implemented by modifying game software, despite EULAs which forbid modification. While game software distributed in binary-only versions makes it harder to modify code, reverse engineering is possible. Also game data files can be edited separately from the main program and thereby circumvent protections implemented in software.
System software modification
Rather than modifying the game code (which the game itself or a 3rd-party protection system may detect), some cheats modify underlying system components. An example of this is graphics driver modifications that ignore depth checking and draw all objects on the screen—a primitive wallhack. System or driver modification is harder to detect, as there are a large number of system drivers that differ from user to user.
Packet interception and manipulation
The security of game software can be circumvented by intercepting and/or manipulating data (divided into "packets") in real-time while in transit from the client to the server or vice versa (i.e. a man-in-the-middle attack). Interception can be passive or result in active manipulation; either method[ambiguous] can be performed on the client machine itself or via an external communication proxy; some aimbots incorporate this method.[ambiguous]
Anti-cheating methods and limitations
There are many facets of cheating in online games which make the creation of a system to stop cheating very difficult; however, game developers and third-party software developers have created or are developing technologies that attempt to prevent cheating. Such countermeasures are commonly used in video games, with notable anti-cheat software being GameGuard, PunkBuster, Valve Anti-Cheat (specifically used on games on the Steam platform), and EasyAntiCheat.
Exploits of bugs are usually resolved/removed via a patch to the game; however, not all companies force the patches/updates on users, leaving the actual resolution to individual users.
Authoritative and mirrored server design
Generally, the better the server is at enforcing the rules, the less of a problem cheating will be in the game. In this approach all client functionality either runs purely on the game server or alternatively the game server mirrors the client gameplay and continuously validates the game state. In many mobile games, it is a common practice to run the client game sessions synchronously on the server, using exactly the same user input. The client session is reset when the game sessions become unsynced, thereby preventing cheating.
Server-side game code makes a trade-off between calculating and sending results for display on a just-in-time basis or trusting the client to calculate and display the results in appropriate sequence as a player progresses. It can do this by sending the parts of the world state needed for immediate display, which can result in client lag under bandwidth constraints, or sending the player the entire world state, which results in faster display for the player under the same bandwidth constraints, but exposes that data to interception or manipulation—a trade-off between security and efficiency.
When game servers were restricted by limited available resources such as storage, memory, internal bandwidth, and computational capacity due to the technologies available and the cost of the hardware, coupled with internet connections that were slow, it was believed to be necessary to compromise on security for optimization to minimize the impact on the end-user. Today however, with the increased speed and power of multi-core computers, lower-priced hardware, and the increased availability of broadband internet, this has become less of an issue.
Additionally to storing data in non-standard formats, some games also utilize runtime protection through software protectors. The key target is to keep attackers from directly inspecting or modifying compiled software. Protectors utilize any of three methods to protect software.
Encryption solutions will encrypt the code instructions and typically use a multi–layered defense mechanism against any reversing or tampering attempts that target the decryption code directly. Most protection systems in this category encrypt the code and then decrypt it at the application's startup or during runtime. This is the moment at which an attacker will breakpoint, reverse, and inject custom code. Runtime decryption may also add significant processing overhead and lower the game's framerate. Alternatively, some solutions focus on obfuscating the code by inserting jump statements and seemingly random instruction paths. The final and strongest alternative is virtualization. In this approach the encrypted code runs on a virtual CPU that can be markedly different from generic x86 and x64 CPUs as the command set can be unique for each protected file.
The shared weakness of protectors and virtualizers is that they impact performance, either by requiring decryption or by introducing unnecessary CPU instructions. To reduce the overhead code virtualizers are often only used to secure the critical parts of the code base, such as those interfacing with the gamestate and rendering.
Spectator functionality can allow server administrators to monitor individual players and thereby determine whether or not a cheat is in place. One risk of the spectator mode is that in competitive matches the spectator could abuse the mode for spying on specific players and communicating player positions and tactics to the opposing team. Some games get around this limitation by not allowing spectator mode at all, or by delaying the video feed.
Some games have systemized player supervision by allowing the community to review reports of disruptive behavior, determine whether those reports are valid, and apply temporary bans if appropriate. Reports can include data such as screenshots, videos, and chatlogs.
Anomalies in player behavior can be detected by statistically analyzing game events sent by the client to the server. The great benefit is that this anti–cheat method is non–intrusive to the player's privacy and guaranteed to work on all end–user system configurations. The restriction of this method is that it cannot always be clear whether or not a player is cheating. Highly skilled players can for example develop such a map sense that they may end up being flagged for the use of a wallhack and/or aimbot. On the other hand, players may also cheat in a way that is under the detection thresholds and remain uncaught.
To reduce the amount of false positives, statistical detection systems are often combined with a supervision system that either is community driven or managed by a professional administrator team. In such implementations unusual player behavior can trigger a client-side component to create and upload reports for review.
Pattern detection systems scan the player's hard drives and system memory for known cheat code or programs. Compared to statistical detection the key advantage is that also the subtle cheaters are detected. Other than this, a pure pattern detection approach generally has few advantages. Experience has shown that keeping detection-based systems up to date is relatively slow and labor-intensive as one needs to constantly track down cheats and update detection patterns. End–users may also be concerned with privacy issues, such as has been the case with VAC (Valve Anti-Cheat) accessing browsing history.
Sandboxing a software process can protect against potentially malicious actions such as code injection and memory modifications that would otherwise tamper with the game. One of the key benefits of sandboxing is that it can effectively prevent the underlying cheat mechanisms from working, and thereby can avoid the need for banning game community members as cheats simply don't work. Additionally, strong prevention mechanisms can stop many game hackers from targeting the game because of elevated skill requirements. Compared to pattern detection systems, sandboxing is generally not privacy invasive, as the approach requires no data to be uploaded to foreign back-end systems.
Anti-cheat software commonly use low-level system interfaces not intended by the OS vendor for public use. As a result, they are a common source of incompatibilities with newer versions of operating systems and security measures as well as alternative OS API implementations such as WineHQ. For example, Windows enables Hypervisor-protected Code Integrity (HVCI) by default in every market except Chinese and Korean installations due to anti-cheat compatibility issues.
Game publishers can implement a wide array of consequences for cheating players.
Some game publishers may decide to try and permanently ban players who are persistent in cheating and ruining the game community. Such bans are typically placed based on hardware ID or IP address. Consequently, cheaters may develop ways of getting around these bans, by either playing through proxy or VPN servers, or spoofing or changing their hardware configuration.
Some companies and leagues ban suspected cheaters by blacklisting specific installation or serial keys, or user accounts, meaning that the player is effectively prevented from playing the game online. Certain games are known to identify cheaters and "shadow ban" them by placing them in matchmaking with other cheaters only, so as not to let the cheaters know that they have been identified.
While game publishers are known to ban players employing cheats, the actual number of players banned is usually not revealed. Exceptions to this include Blizzard Entertainment, Nexon, and CipSoft, known for banning cheaters in batches, and publicising the number of banned accounts, presumably in order to discourage others from cheating.
In some cases a ban may not be permanent and expire after a certain period of time. This approach is commonly used as a ramification for the abuse of game glitches, harassing players, or benefiting from hackers. Temporary bans may also be utilized in case a violation cannot be fully proven, as is common with anti-cheating methods based on supervision or statistical detection.
In general kicking is perceived as a mild ramification, serving as a warning rather than a punishment for the player in question. Some anti-cheat systems may decide to kick players out of a game server when the system integrity cannot be enforced nor be determined with certainty. Other anti-cheat methods may also utilize kicks as an instant punishment for presumably unfair game play behavior.
Some games may also provide the community with the option of voting for particular players to be kicked. Such a system provides the power to self-regulate and effectively get rid of abusive players without depending on supervision or other anti-cheat methods. Even though vote kicking brings many benefits, it may also serve as a tool for trolling or griefing by allowing for legitimate players to be removed out of the game through the voting process.
When a violation is the result of farming or stat-padding, it may be too severe of a punishment to suspend or ban players. Some games, therefore, implement a system of demotion in which the offender is moved to a lower rank (demoting), the opposite of a promotion.
In several games where points are used, if a player is caught cheating they will get their score reset to the base value that is applied when a new player joins the server.
In recent years, countries including South Korea and China have criminalized the sale or use of cheats in video games. The presence of cheaters in online games may push away the legitimate playerbase and reduce overall profits in the industry, leading to game developers working with legislative bodies or enforcement agencies.
Historically, some game companies have also filed suit against individuals or commercial entities that have created and sold cheating tools in video games as a means to curb their use. In April 2013, coder DrUnKeN ChEeTaH was sued by Nexon America for operating GameAnarchy, a popular subscription based cheat provider for Combat Arms, and lost, Nexon being awarded $1.4M in damages. In January 2017, Riot Games successfully sued the LeagueSharp service, which offered a subscription-based hacking service for Riot's League of Legends, with a $10 million award to be paid to Riot.Blizzard Entertainment sued Bossland GMBH for distributing software hacks for several of its games, and was awarded $8.5 million in damages.
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