Alien Swarm

Alien Swarm mods

A mod changes the game itself. It needs something to load it, it may need other mods first, and it only works on the versions its author built it for.

99 mods · newest update 20 Jan 2026

Maps85 GUIs6

99 mods

Most downloaded Most followed Recently updated Newest A to Z

Mausoleum Survivalby OgachiMaps / Other/Miscupdated 16 y ago
Holdoutby jamespizzurroMaps / Campaignupdated 16 y ago
Heat Strokeby LocutusMaps / Campaignupdated 16 y ago

99 mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.