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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.

Quick List Mods

Free

Alien Swarm: Reactive Drop
Alien Swarm: Reactive Drop

Alien Swarm: Reactive Drop

Adds new PvP game modes and co-op features into Alien Swarm without changing its concept.

2 months ago, Released Apr 9, 2014 Multiplayer Arcade

Free

Hypovolemia
Hypovolemia

Hypovolemia

Hyp is a top-down shooter that focuses on intricate game design while offering a unique way to be immersed in the shooting culture.

7 months ago, Released May 18, 2012 Single & Multiplayer Third Person Shooter

Free

Alien Swarm:SP
Alien Swarm:SP

Alien Swarm:SP

Play the official Alien Swarm maps and any addons through the Offline Practice mode. Alien Swarm:SP also supports a large amount of configurable changes for mappers to help them create new single player...

1 year ago, Released May 17, 2012 Single Player Third Person Shooter

Free

Alien Swarm Director Mod
Alien Swarm Director Mod

Alien Swarm Director Mod

Welcome to the Alien Swarm Director Mod! ASDM is a single player Alien Swarm mod focusing on increasing replayability by creating a dynamic experience every time you play. The ASDM complements the default...

1 year ago, Released May 17, 2012 Single Player Third Person Shooter

Free

IAF Weapon Drop
IAF Weapon Drop

IAF Weapon Drop

Almost all weapons were modified more or less noticeable. Some of them are big changes (like semi-auto Railguns and Sniper Rifles or Miniguns with lot more ammo but much longer reload time) and some are...

2 years ago, Released Mar 10, 2012 Multiplayer Third Person Shooter
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