Special Note: The mod has been renamed to "Lambda Wars". Install Instructions: 1. Extract contents into your sourcemods folder (default location: C:\Program Files (x86)\steam\steamapps\sourcemods). 2. Restart steam. 3. "Lambda Wars" should now appear in your games list. If you do not have "Alien Swarm" installed, it will ask you to download it upon launching the mod.

Full changelog: