Online Game Security & Multiplayer Testing
If players can manipulate it, they will. From client-side tampering and RPC abuse to inventory duplication and economy inflation, we identify the game-breaking exploits that automated anti-cheat systems miss.
10+ Years of Gaming Security
Engine-Aware Testing (Unreal, Unity, Custom)
Pair Hacking Methodology
What Is Online Game Penetration Testing?
Traditional web application testing fails to account for binary manipulation, engine-level logic abuse, and the adversarial mindset of cheat developers. Our testing covers the entire game ecosystem - from the binary on the player's desktop to the server-side authoritative state.
This is not generic web testing. Game security requires specialized expertise in binary analysis, network protocol reverse-engineering, and game engine logic.
We simulate how real cheat developers, exploit communities, and adversarial players operate - finding the 'hidden' features in your code that can be weaponized.
Why Online Games Are Targeted Differently
Traditional SaaS platforms deal with user errors; multiplayer games deal with adversarial engineering. Your game is a high-frequency, financial ecosystem where competitive integrity is the primary product. If the integrity breaks, the players leave.
Real-Time Attack Vectors
Testing games the way exploit communities do
Client-Server Manipulation: Exploiting the lag between the client’s "truth" and the server’s "authority" to enable speed-hacks, teleportation, or wallhacks.
RPC & Protocol Abuse: Forging, replaying, or mutating Remote Procedure Calls (RPCs) to trick the server into authorizing actions the client shouldn't be allowed to perform.
Anti-Cheat Arms Race: Identifying the logic bypasses that automated anti-cheat tools (EAC, BattlEye) cannot see because the exploit mimics legitimate player behavior.
Server-Side Validation Gaps: Identifying "Trust-the-Client" vulnerabilities where the game server fails to verify critical gameplay actions, effectively leaving the doors open for script-based automation.
Economy & Currency Inflation: Simulating mass-scale item duplication, trade exploits, and market-flooding attacks that can permanently destroy a game’s in-game economy.
Matchmaking & Ranking Manipulation: Stress-testing the lobby and matchmaking systems to prevent boosting, stream-sniping, and MMR (Matchmaking Rating) manipulation.
In a game, every packet is a potential exploit vector. Security failures here aren't just technical - they directly impact player retention, competitive integrity, and your bottom line. We test to ensure your game design remains the rulebook, not the exploit target.
Pair Hacking: Intelligence-Led Multiplayer Security
Multiplayer games are complex, high-frequency ecosystems. Exploits thrive in the latency and logic gaps between the client and the server. All Cyrex engagements utilize Pair Hacking to bridge the divide between binary analysis and server-side validation.
Cross-Boundary Chaining (Client + Backend)
We don’t test in silos. One engineer probes the game binary for memory injection or state-manipulation points, while the second simultaneously pressures the backend APIs. We chain these findings to prove how a "minor" client exploit can lead to a "critical" server-side economy compromise.
Race Condition & Desync Validation
Exploits often hide in the milliseconds of latency between client updates. We systematically test desynchronization scenarios - identifying Race Conditions that single testers - or automated scanners - routinely miss.
Concurrent Multi-User Exploitation
Real-world exploits often require coordination (e.g., player A blocks the server while player B duplicates the item). We replicate these multi-player exploitation scenarios in parallel, testing your server’s logic under heavy, coordinated load.
Adversarial Mimicry
We operate exactly like the cheat developers and exploit groups you fear. We collaborate, share findings, and iterate in real-time to uncover the exploit paths that only emerge through collective, adversarial effort.
Economy-Breaking Logic Audits
We focus specifically on the logic that governs item movement, trade, and currency. We don’t just look for bugs; we look for the "game-breaking" logic flaws that lead to inflation, duplication, and market crashes.
Exploit Path Discovery
Single-tester engagements usually stop at the first roadblock. Our Pair Hacking approach ensures that if a path looks blocked, we collaborate to find the "side-door." This is how we uncover the complex, multi-stage attack chains that define modern gaming breaches.
Exploit groups don't work alone. Our methodology ensures that your defense doesn't either. By synchronizing our attack on your client and your server simultaneously, we identify the vulnerabilities that exist only in the connection between them.
What We Test in Online Games
We don’t just test the network; we understand the engine internals, serialization protocols, and replication models that define your game’s security profile.
Engine & Technology Expertise
Many firms treat games as 'black boxes.' We treat them as architectures. We understand the specific developer assumptions - like trusting the client for position updates or assuming the anti-cheat is a silver bullet - that lead to the most catastrophic exploitable logic gaps.
Tailored Testing for Every Development Stage
Whether you are in pre-production or running a live-service global title, we adapt our access and methodology to your specific development lifecycle.
When to Schedule Online Game Security Testing
If your game has competitive or financial systems, structured security testing is mandatory. Do not wait for a player community-driven exploit to define your game’s security posture.
What Our Clients Say
Real experiences from teams we’ve protected
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Cheat Developers Collaborate. So Do We.
Exploit communities operate methodically, reverse-engineer relentlessly, and share findings globally. Our testing mirrors that reality. Engage Cyrex for structured online game penetration testing and anti-cheat validation.
We test your game the way exploit groups do - methodically, collaboratively, and in real-time - to ensure your defenses stay ahead of their evolution.