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 - 33 of 33)
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.

Icon
Alien Swarm
Platform
Windows
Developer & Publisher
Valve
Engine
Source
Contact
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Official Page
Alienswarm.com
Release Date
Released Jul 18, 2010
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Mod Statistics
Mods
33
Released
16
Unreleased
17
Views
1,928,705
Views Today
485
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Popular Mods
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
Hypovolemia (Alien Swarm)
Hypovolemia Alien Swarm - Single & Multiplayer Third Person Shooter
Alien Swarm:Silencer Mod (Alien Swarm)
Alien Swarm:Silencer Mod Alien Swarm - Single, Multiplayer & Co-Op Third Person Shooter
Omnibus (Alien Swarm)
Omnibus Alien Swarm - Single & Multiplayer Arcade
ALIEN SWARM FP (Alien Swarm)
ALIEN SWARM FP Alien Swarm - Co-op First Person Shooter
Alien Swarm:SP (Alien Swarm)
Alien Swarm:SP Alien Swarm - Single Player Third Person Shooter
Black Mesa Swarm (Alien Swarm)
Black Mesa Swarm Alien Swarm - Single & Multiplayer First Person Shooter
ASB²  mod (Alien Swarm)
ASB² mod Alien Swarm - Multiplayer Tactical Shooter
ALIENS (Alien Swarm)
ALIENS Alien Swarm - Single & Multiplayer Tactical Shooter
Swarm Director 2 (Alien Swarm)
Swarm Director 2 Alien Swarm - Single & Co-op Third Person Shooter
Swarm Keeper (Alien Swarm)
Swarm Keeper Alien Swarm - Single & Multiplayer Real Time Strategy
Alien Swarm Director Mod (Alien Swarm)
Alien Swarm Director Mod Alien Swarm - Single Player Third Person Shooter
Alien Swarm: The Darkness (Alien Swarm)
Alien Swarm: The Darkness Alien Swarm - Single & Multiplayer Tactical Shooter
Infestation (Alien Swarm)
Infestation Alien Swarm - Multiplayer Third Person Shooter