Installing Mods on Left 4 Dead 2

Getting SourceMod & Metamod:Source running

Left 4 Dead 2 runs on Valve's Source engine, but Spawnly doesn't ship an in-app mod manager for it — installation works the same way it does on any Source dedicated server: you extract the SourceMod and Metamod:Source Linux builds directly into the game's mod folder, and the engine picks them up automatically at boot.

1. Download the Linux release builds of Metamod:Source and SourceMod — Metamod needs to go in first since SourceMod runs as a Metamod plugin.
2. Open the Files tab (File Manager) and navigate into the left4dead2 folder — this is the game's mod directory, the same role tf/ plays on a TF2 server.
3. Upload and extract both archives into left4dead2/, preserving their folder structure. This merges their contents into the existing addons/ folder so you end up with left4dead2/addons/metamod and left4dead2/addons/sourcemod alongside what's already there.
4. Restart the server. The engine loads Metamod automatically at startup, and Metamod loads SourceMod in turn — no extra launch flags or wrapper support needed.

To add individual SourceMod plugins afterward, drop their compiled .smx files into left4dead2/addons/sourcemod/plugins/ and restart.

Next steps

Back up your server before extracting a large mod archive — see Managing Backups & Restoring Your Server. For general setup, see Getting Started with Your Left 4 Dead 2 Server.