Anti-Cheat for Multiplayer Games: Options for Small and Mid-Size Studios

Cheating ruins multiplayer games faster than almost anything else. One cheater in a lobby can ruin the experience for ten players. And once a game gets a reputation for having a cheating problem, players leave and don’t come back.

Big studios have full security teams and custom anti-cheat software built over the years. Small and mid-size studios don’t have that. What they do have is a multiplayer game that needs to ship, a real budget constraint, and a decision to make about how to protect the experience they’ve built.

This guide covers the anti-cheat options that actually work for studios below AAA scale. Every option here is practical, clearly explained, and honest about what it does and doesn’t protect against. If you’re planning a multiplayer game development project, these are the decisions to get right before launch, not after.

Understanding these options early, during the planning and prototyping stage, is far cheaper than trying to add anti-cheat after the game is already live and players are complaining. This guide walks through every practical choice available to small and mid-size studios in 2026.

Why Cheating Is Difficult to Stop

Before diving into solutions, it helps to understand the core problem. The game client runs on hardware the player controls. Any data the client holds, like player position, health, or opponent locations, can be read and changed by someone with the right tools.

This is not a software flaw. It is simply what happens when you run code on someone else’s computer. The client needs certain information to display the game correctly, and anything it knows can potentially be extracted or modified.

Anti-cheat systems work by making cheating harder, easier to detect, or less effective. None of them make cheating impossible. The goal is a game where:

• Cheating requires enough effort that most players don’t bother
• Obvious cheating gets caught and acted on quickly
• The majority of players have a fair and enjoyable experience

Thinking about anti-cheat as risk management rather than a perfect shield leads to better decisions. Studios that expect a zero-cheat outcome end up either spending too much chasing it or feeling like their anti-cheat has failed when it hasn’t.

The Four Main Approaches

There is no single anti-cheat solution that stops every type of cheating. These four approaches work together to protect game logic, detect unauthorized tools, and identify suspicious player behavior.

1. Server-Side Validation

Server-authoritative architecture is the most effective anti-cheat approach available, and it is not a tool you add to a game. It is a design decision made from the very start of development.

In a server-authoritative multiplayer game, the server is the source of truth for all game state. The client sends inputs, such as “I pressed fire” or “I moved left,” and the server decides what actually happens. The client predicts results locally for smooth gameplay, but those predictions are always checked and corrected by the server.

What this prevents:

• Speed hacks, because the server controls movement, not the client
• Teleportation hacks, because the server validates all positions
• Invulnerability hacks, because the server calculates all damage
• Resource manipulation, because the server tracks all game economy values

What this does not prevent:

• Aimbots, because the client still controls where the player aims
• Wallhacks, because the client receives opponent positions in order to render them

Server authority is the foundation everything else builds on. A multiplayer game without it is vulnerable to a whole category of cheats that no external tool can reliably stop. For studios using Unity game development or Unreal Engine development, both platforms support server-authoritative architectures natively.

2. Anti-Cheat Middleware

Several third-party anti-cheat tools are available to indie and mid-size studios. They each make different tradeoffs between security, cost, and player experience.

Easy Anti-Cheat (Epic Online Services)

Easy Anti-Cheat is the most widely used anti-cheat solution for indie and mid-size multiplayer games. It is available free through Epic’s Online Services SDK and works with both Unity and Unreal Engine.

EAC runs as a driver on Windows that watches for memory manipulation, process injection, and known cheat software. It keeps a database of detected cheats and bans accounts where cheating is confirmed.

What it does well:

• Detects common off-the-shelf cheat tools
• Maintains a ban database that grows over time
• Gives players confidence that the game takes cheating seriously

Limitations:

• Windows only, so Mac and Linux players either get less protection or cannot play
• Sophisticated custom cheats can run for weeks before signatures update
• Some players are uncomfortable with kernel-level software from a game publisher

BattlEye

BattlEye is the other major anti-cheat service, used in games like Fortnite and Escape from Tarkov. It works similarly to EAC but is generally considered slightly more aggressive in its detection. This means better coverage but also more occasional false positives. Licensing is custom-priced, making it a higher-cost option for small studios compared to EAC’s free tier.

Valve Anti-Cheat (VAC)

VAC is available to games on Steam through Steamworks integration. It is less aggressive than EAC or BattlEye but is essentially free for Steam games and provides a baseline level of protection. For a game primarily on Steam that does not have resources for EAC integration, VAC is worth enabling simply because having no anti-cheat at all is clearly worse.

3. Obfuscation and Memory Protection

Obfuscation does not stop cheating. It raises the difficulty of reading game memory and understanding game code. For games without the resources for third-party middleware, basic obfuscation is the minimum worth doing.

In Unity, tools available on the Unity Asset Store can scramble variable names and encrypt memory values in a way that makes standard memory editing tools less effective. They are not a substitute for server authority or proper middleware, but they stop casual memory editing tools from working automatically.

Unreal Engine provides some code protection through its shipping build process. Additional steps like Blueprint encryption are available in packaging settings and worth enabling for any competitive multiplayer game.

The honest assessment: obfuscation protects against lazy cheaters using off-the-shelf tools. It does not protect against motivated cheaters using custom solutions. For casual multiplayer with low competitive stakes, this may be sufficient.

4. Replay Analysis and Statistical Detection

This approach looks at player behaviour across many games rather than checking game memory. Suspiciously high headshot rates, impossible reaction times, and movement patterns that no human produces naturally can be flagged and reviewed.

For small studios, building a full statistical detection system from scratch is usually not feasible. A lighter version is within reach though:

• Store server-side replays from day one
• Build simple tooling to flag obvious statistical outliers
• Review flagged accounts and act on confirmed cases

This approach generates false positives that require manual review, and it is reactive rather than preventative. But it catches things that client-side anti-cheat cannot, and it is built on server-side logging infrastructure that is worth having regardless of anti-cheat.

What Server-Authoritative Actually Means

This term appears constantly in multiplayer discussions and is often misunderstood. It is worth being clear about what it actually means in practice.

Client-side authority means the client decides what happened and tells the server. “I moved to position X.” The client decided this, the server accepted it. This is faster to build but every client-determined value is a potential attack surface.

Server-side authority means the client sends inputs and the server decides what happens. “I pressed W.” The server calculates the new position and tells the client where the player is. The client may predict the result locally for feel, but the real value lives on the server.

The table below shows what each model does and does not protect against:

Cheat type	Client authority	Server authority
Speed hack	Vulnerable	Protected
Position manipulation	Vulnerable	Protected
Health modification	Vulnerable	Protected
Resource hack	Vulnerable	Protected
Aimbot	Vulnerable	Vulnerable
Wallhack	Vulnerable	Vulnerable

Aimbots and wallhacks remain possible even with server authority because the client still controls aim and receives opponent position data to render them. This is why server authority alone is not a complete solution. It closes the largest attack surface but not all of them.

Implementation for Unity and Unreal

Both Unity and Unreal Engine support server-authoritative multiplayer and anti-cheat integrations. The right implementation depends on your networking setup, platform requirements, and level of protection needed.

Unity

Unity’s multiplayer networking solutions, including Netcode for GameObjects and Mirror, all support server-authoritative architectures. Netcode for GameObjects includes client-side prediction with server reconciliation out of the box.

For Easy Anti-Cheat integration, Epic’s Online Services SDK includes integration documentation. The setup requires platform-specific builds and a few days of careful pipeline work.

For memory protection, several tools on the Unity Asset Store integrate at build time with minimal code changes. Always verify these work correctly with your chosen render pipeline before shipping, as some interact with shader compilation.

Unreal Engine

Unreal Engine’s multiplayer framework is server-authoritative by default. The Replication system is built around the server as the authority, so teams using native Unreal multiplayer get this as the starting point.

For Easy Anti-Cheat in Unreal, Epic maintains official integration documentation through the EOS SDK. Blueprint encryption is available in packaging settings and worth enabling for any shipped competitive game.

Building for Competitive Integrity From Day One

Studios that handle cheating well share one consistent approach: they plan for it from the very start of production rather than reacting to it after launch.

A few principles worth following from the beginning:

• Never trust the client with anything that affects gameplay outcomes. Positions, health, damage, economy values, and matchmaking data should all be validated server-side.
• Log everything server-side from day one. Replay data and server logs are cheap to store and invaluable for cheat detection and debugging. Building this early means the data exists when you need it.
• Integrate anti-cheat middleware before launch, not after. Adding EAC to a shipped build pipeline is more disruptive than building it in from the start.
• Be transparent with the community about what protections are in place. Players in competitive games care about this, and visible, responsive banning builds trust.

The architecture decisions made in the first few weeks of a multiplayer project shape how expensive every future security decision becomes. Studios that treat this as a launch-day problem tend to pay for that choice in player churn.

Build Your Multiplayer Game With a Team That Gets It Right

Building a multiplayer game means making dozens of interconnected decisions that compound on each other. Network architecture, server infrastructure, anti-cheat integration, and platform distribution all interact in ways that are much cheaper to get right early than to fix later.

At 300Mind, we build multiplayer games across Unity and Unreal Engine for studios at every stage, from early prototype through to full production. We’ve worked through these architecture decisions on real shipped titles and know where the expensive mistakes tend to happen.

Whether you’re figuring out your network architecture, choosing an anti-cheat approach, or building the game from scratch, our team is available to work alongside yours. Visit 300mind.studio or reach out directly to start a conversation about your project.

Frequently Asked Questions