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.

Summary List Mods  (30 - 36 of 36)
Alien Haunt
Alien Swarm

Alien Haunt

4 years ago Released Oct 31, 2010 Single & Multiplayer Adventure

Alien Haunt. A Map for Alien Swarm. 1 Campaign with 5 maps. Get ready to be swarmed by aliens!

Alien Swarm: The Darkness
Alien Swarm

Alien Swarm: The Darkness

4 years ago TBD Single & Multiplayer Tactical Shooter

The Darkness is a mod designed to put the players into a much more difficult position than that of the original Alien Swarm, by removing a lot of lighting...

Alien Swarm


4 years ago TBD Single & Multiplayer Arcade

Warhammer 40k mod for Alien Swarm. You play as one of four members in a Space Marine squad and you're sent to a Tyranid infected planet to investigate

Phobos Incident
Alien Swarm

Phobos Incident

4 years ago TBD Multiplayer Third Person Shooter

Phobos Incident is going to be a full-fledged campaign for Alien Swarm. It can be considered as a re-imagining or an alternate future for the base that...

Alien Frenzy
Alien Swarm

Alien Frenzy

4 years ago TBD Multiplayer Real Time Strategy

The year is 2026. The earth has been mostly destroyed by sunflares after the alien invasion. It seems their planet was destroyed first. The aliens came...

Infested Office
Alien Swarm

Infested Office

4 years ago Released Jul 21, 2010 Single & Multiplayer Third Person Shooter

A test of skill and teamwork, this addon/map pack challenges you and your team even on the easier difficulty settings.

Alien Swarm
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Released Jul 18, 2010
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Lambda Wars (Alien Swarm)
Lambda Wars Alien Swarm - Single & Multiplayer Real Time Strategy
Alien Swarm: Reactive Drop (Alien Swarm)
Alien Swarm: Reactive Drop Alien Swarm - Single, Multiplayer & Co-Op Arcade
The Survival (Alien Swarm)
The Survival Alien Swarm - Single Player First Person Shooter
ALIEN SWARM FP (Alien Swarm)
ALIEN SWARM FP Alien Swarm - Co-op First Person Shooter
Modular Combat 2 (Alien Swarm)
Modular Combat 2 Alien Swarm - Multiplayer & Co-op First Person Shooter
Black Mesa Swarm (Alien Swarm)
Black Mesa Swarm Alien Swarm - Single & Multiplayer First Person Shooter
Hypovolemia (Alien Swarm)
Hypovolemia Alien Swarm - Single & Multiplayer Third Person Shooter
Omnibus (Alien Swarm)
Omnibus Alien Swarm - Single & Multiplayer Arcade
Alien Haunt (Alien Swarm)
Alien Haunt Alien Swarm - Single & Multiplayer Adventure
Alien Swarm Director Mod (Alien Swarm)
Alien Swarm Director Mod Alien Swarm - Single Player Third Person Shooter
Alien Swarm:SP (Alien Swarm)
Alien Swarm:SP Alien Swarm - Single Player Third Person Shooter
Alien Swarm:Silencer Mod (Alien Swarm)
Alien Swarm:Silencer Mod Alien Swarm - Single, Multiplayer & Co-Op Third Person Shooter
ALIENS (Alien Swarm)
ALIENS Alien Swarm - Single & Multiplayer Tactical Shooter
Brawlers (Alien Swarm)
Brawlers Alien Swarm - Multiplayer Third Person Shooter
Alien Swarm: Rifle Mod (Alien Swarm)
Alien Swarm: Rifle Mod Alien Swarm - Single & Co-op Arcade