This wiki serves as a resource for all Alien Swarm Titles, information on all versions can be found throughout this resource.

Alien Swarm: Reactive Drop Edit

Main article: Alien Swarm Reactive Drop

Alien Swarm: Reactive Drop is a standalone game which extends Alien Swarm through new maps, aliens, game modes, guns and most importantly Steam Workshop support.

Alien Swarm for SourceEdit

Main article: Alien Swarm Source

Alien Swarm is a game and Source SDK release from a group of talented designers at Valve who were hired from the Mod community.

Alien Swarm for UT 2K4Edit

Main article: Alien Swarm 2K4

There is an older version of this game available. It is a modification of Unreal Tournament 2004, and has won the 'Make something unreal' contest back then. While it met with much appreciation and kept a small but steady player base, it is NOT what this wiki is about. Information and download links can be found at their website, where it is referred to as AlienSwarm2K4.