Security testing and audits for multiplayer games
We test the systems attackers target in online games: the authoritative server, the backend, and anything tied to accounts or money. You receive a clear report with proof and fixes that your team can act on.
We test only what you own and authorize in writing. Findings stay private.
What we offer
Multiplayer security audit
A full review of your client, server and backend against the attacks that matter for online games.
Pre-launch assessment
A focused check before you ship, so launch day is not the first time your systems meet real pressure.
Backend and API review
Authentication, authorization and validation across every endpoint and real-time message.
Retest and sign-off
After you ship fixes, we confirm they hold and give you a short written result you can share.
What we look at
Server authority
Whether the server trusts the client for things it should decide on its own, such as movement, damage, drops and state.
RPC and messages
Every call and packet checked for authorization, validation and replay, not only the path the game normally takes.
Matchmaking and lobbies
Joining, hosting and party flows that let a player reach data or actions that are not theirs.
Leaderboards and scores
Score submission and ranking that can be forged, replayed, or set to values no real player could reach.
Purchases and economy
Receipt checks, currency, trading and item grants that can be abused to gain value for free.
Accounts and sessions
Login, tokens and session handling, together with rate limits on the endpoints that would hurt if abused.
Engines and backends
We work with Unity and Godot clients, and with the backends most teams use, including Nakama, PlayFab and Firebase, as well as plain REST or WebSocket servers built in house. If your stack is custom, tell us about it and we will say honestly whether we can help.
How we work
- We agree on scope and you provide written authorization. We test only systems you own.
- We test the client, the server and the backend by hand, and run the Xila scanner on your build as a first pass.
- We deliver a report with each finding, its location, its severity, and how to fix it.
- We walk through the report with your team so everyone knows what to change and why.
- After you ship the fixes, we retest to confirm they hold.
What you receive
- A written report your developers can act on directly.
- Proof for each finding, with the exact location and steps to reproduce.
- A severity rating for every issue, so you know what to address first.
- Remediation guidance written in plain language.
- A walkthrough call to answer questions from your team.
- A retest after you ship, included in the engagement.
Our approach
We focus on multiplayer games because that is where the serious bugs live: servers that trust the client, economies that can be drained, and accounts that can be taken over. The open source scanner on this site is part of how we work, so you can see how we think before you engage us.
Scope and authorization
We test only what you own and authorize in writing. We do not test third party services such as Steam, PlayFab, Firebase or Nakama beyond your own configuration, unless their terms allow it. Findings stay private, and we follow the disclosure approach in our security policy.
Request an assessment
Send a short note with your engine, your backend, and your launch timeline. We usually reply within two business days.