An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the icy planet's surface, to a subterranean lava-flooded mining facility.
This addon disables drone's screaming, pain and roar sounds in Alien Swarm.
Automatic. Extract the VPK addon file from the archive and double click it.
Manual. Extract the VPK addon file from the archive and copy it into your "addons" folder:
C:\Program Files\Steam\SteamApps\common\alien swarm\swarm\addons\
C:\Program Files (x86)\Steam\SteamApps\common\alien swarm\swarm\addons\
After installation launch the game, enable Developer Console in Keyboard settings. Open developer console using tilde key (~) and enter:
Restart the game.