Windows vs. Linux Builds

The majority of dedicated game servers in production run on Linux. Hosting Providers standardize on Linux for cost, performance, and tooling reasons. The decision you make here directly affects how easy it is for anyone to run your server.

Why Linux Is the Standard

• No licensing overhead: Windows Server requires per-core or per-instance licensing. Linux does not. This matters when a hosting provider runs hundreds of game servers per machine.
• Better resource efficiency: Linux has lower idle memory usage and less OS-level overhead, meaning more of the machine’s resources go to running your game.
• Container and orchestration support: Docker, Kubernetes, and the tooling around them are Linux-native. Containerized game server hosting is the industry standard.
• Consistent deployment: Linux server environments are reproducible and scriptable from top to bottom.

Native Linux Build

If you can produce a native Linux binary, do it. This is the gold standard.

Benefits:

• No “emulation” overhead
• Full compatibility with container-based hosting
• Predictable performance characteristics
• Easier debugging in production (standard Linux tooling works)

Most game engines support Linux build targets. See the engine-specific guides in Building Your Server Executable for setup details.

What Happens When You Only Ship Windows

If you only provide a Windows server executable, Hosting Providers will run it under Wine or Proton on Linux. This works, but comes with real costs:

• 10-20% higher CPU usage from the “emulation” layer
• Higher memory consumption per server instance
• Compatibility issues that appear only under “emulation” (filesystem behavior, threading, network stack differences)
• Harder to debug when something goes wrong, because the failure may be in Wine, not your code

Hosting Providers absorb this overhead, which typically means fewer servers per machine, which typically means higher costs passed on to players or lower margins for you.

If You Must Ship Windows

Some teams cannot realistically produce a Linux build for their first launch. If that’s you:

Document your dependencies. Hosting Providers need to know exactly what your server requires:

• DirectX version
• Visual C++ Redistributable version
• .NET Framework or .NET Runtime version
• Any other third-party runtimes or libraries

Test under Wine/Proton yourself. Do not leave this to hosting providers to discover. Run your server under Wine on Linux and verify:

• Server starts and accepts connections
• Players can connect and play normally
• Save files write and read correctly
• Console output works as expected
• Server shuts down cleanly

Plan for a Linux build later. A Windows-only launch is acceptable as a starting point, but you should treat the Linux build as a priority follow-up.

Common Portability Pitfalls

If you’re developing on Windows and targeting Linux (or both), watch for these:

Path separators: Windows uses backslashes (\), Linux uses forward slashes (/). Use your engine’s path utilities or forward slashes consistently in your code. Hardcoded backslash paths will break on Linux.

Case sensitivity: Windows filesystems are case-insensitive. Linux filesystems are case-sensitive. If your code references Config.json but the file is config.json, it works on Windows and fails silently on Linux.

Line endings: Windows uses \r\n, Linux uses \n. Config files and scripts authored on Windows may behave unexpectedly on Linux if you’re doing manual line parsing.

File locking: Windows locks files when they’re open. Linux does not. Code that depends on file locking semantics for mutual exclusion may behave differently.

Temp file locations: /tmp on Linux, %TEMP% on Windows. Don’t hardcode paths to either.

Cross-Compilation and CI/CD

Most CI/CD platforms (GitHub Actions, GitLab CI, Jenkins) can produce Linux builds from any host. Set up your pipeline to automatically produce both Windows and Linux server builds on every release.

If cross-compilation from Windows is an issue with your engine or toolchain, use a Linux build agent. Docker makes this straightforward: run your build inside a container that matches your target environment.

Testing Your Linux Build Locally

You don’t need a Linux machine to test. Use Docker or WSL:

Docker (recommended):

docker run -it -v /path/to/server:/server ubuntu:22.04 bash
cd /server
./your_server_executable -port 27015

This runs your server in the same kind of environment a hosting provider uses. If it works here, it will work in production.

WSL (Windows Subsystem for Linux): Install Ubuntu via WSL and run your server build directly. This is faster for iteration but less representative of production than Docker.