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.

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Added | Game Name | Type
Alien Swarm: The Spaceship

Alien Swarm: The Spaceship

Aug 13, 2010 Full Version (1.82mb) 7 comments

A map I have released. I really do hope you enjoy this as much as I have made it.

Alien Swarm: The Spaceship map 2

Alien Swarm: The Spaceship map 2

Aug 14, 2010 Full Version (0.02mb) 7 comments

The second map to The Spaceship. I am thinking of doing a mod using Alien Swarm. I'll think about it. So far I am making maps for pure enjoyment.

Alien Swarm Campaign BETA

Alien Swarm Campaign BETA

Aug 2, 2010 Demo (20.34mb) 9 comments

A beta of my Alien Swarm campaign, Housle cleaning. Please list bugs in comments. TO INSTALL: go to your alien swarm folder and drop the unzipped file...

Source Multi-Tool 1.0

Source Multi-Tool 1.0

Nov 23, 2013 Mapping Tool (0.91mb) 5 comments

I've been working away at this for quite awhile now and after many revisions I'm happy to release version 1.0 of the new Source Multi-Tool. Source Multi-Tool...

Source Sauce

Source Sauce

Apr 19, 2011 Plugin (0.25mb) 26 comments

A simple Out-Of-Game Tool that let's you set options for multiple Source Games at once, and even let's you set options that are not normally available...

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Jul 10, 2008 Lambda Wars Full Version (128.64mb) 14 comments

This is the zip archive version of the latest HL2:Wars release, v0.5. Please be sure to uninstall any previous versions prior to installation.

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Jul 10, 2008 Lambda Wars Full Version (126.74mb) 57 comments

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Jul 20, 2010 Infested Office Full Version (3.30mb) 1 comment

The first map of the map pack! Double click the unzipped file to install the addon, then make sure to enable it in game in the settings menu and you are...

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Half-Life 2: Wars Beta 1.0.3 ZIP

Mar 7, 2011 Lambda Wars Full Version (193.10mb) 4 comments

ZIP version of the client installer for the Beta 1.0.3 of HL2: Wars.

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EXE installer for the Half-Life 2: Wars Beta 1.0.3 client.

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Mar 17, 2011 Alien Swarm:SP Full Version (15.25mb) 4 comments

This is version 0.3 beta of Alien Swarm SP. Blah blah blah....

Brawl Busters
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Sep 13, 2011 Brawlers Full Version (238.09mb) 4 comments

Brawl Busters, an online multiplayer action combat game, brings a brand new free-to-play experience to PC gamers from all over the world. Featuring innovative...

Alien Swarm Director Mod - Beta 0.1
Alien Swarm

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Oct 3, 2011 Alien Swarm Director Mod Full Version (19.64mb) 0 comments

This is a public beta for ASDM! Please note: in order to play you must have both the Alien Swarm AND Alien Swarm - SDK installed. Both are free on steam...

Alien Swarm Director Mod - Beta 0.2
Alien Swarm

Alien Swarm Director Mod - Beta 0.2

Oct 12, 2011 Alien Swarm Director Mod Full Version (28.17mb) 1 comment

This is version 0.2 public beta for ASDM! This version fixes several problems with doors and adds a new room. Additionally, level generation has been...

Alien Swarm Director Mod - Full Release v 1.0
Alien Swarm

Alien Swarm Director Mod - Full Release v 1.0

Nov 3, 2011 Alien Swarm Director Mod Full Version (26.88mb) 8 comments

Alien Swarm Director Mod full release 1.0! 5 mission campaign with 4 missions built dynamically for ultimate replayability! And ASDM responds to player...

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Brawl Busters Open Beta client

Nov 14, 2011 Brawlers Full Version (268.38mb) 3 comments

The game update features two new modes, all new weapons and cool, never-before-seen outfits. The website will also receive an update that will allow players...

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ASDK Version 1.0

Mar 14, 2012 Alien Swarm SDK Template Conversion Full Version (243.83mb) 1 comment

The latest version of the ASDK. This features ALL from the SDK Template inside Alien Swarm, to re-define what you need; simple edit the shareddef's file!

ASDK - SourceMod Files (Alpha)
Alien Swarm

ASDK - SourceMod Files (Alpha)

Mar 17, 2012 Alien Swarm SDK Template Conversion Full Version (45.30mb) 2 comments

The files you need for SourceMods directory in order to make your game use the ASDK source code. This basically is Alpha because it's ripped directly...

IAF Weapon Drop v1.1
Alien Swarm

IAF Weapon Drop v1.1

Mar 29, 2012 IAF Weapon Drop Full Version (0.42mb) 3 comments

First public version of mod- packed in zip. Contain VPK with mod files and more detailed changelog. IMPORTANT- REMEMBER IF YOU WANT TO PLAY WITH OTHERS...

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Hypovolemia 0.1 Alpha

May 16, 2012 Hypovolemia Full Version (367.52mb) 10 comments

Hypovolemia 0.1 Alpha has been released! Come and get it! EDIT: 12/8/2013 this verison no longer works, don't download it

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Alien Swarm

Swarm Keeper 0.45 Beta ZIP

Aug 26, 2012 Swarm Keeper Full Version (211.41mb) 0 comments

A minor update this time. This update makes it easier to create rooms, fixes several bugs and contains various optimizations.

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Alien Swarm

Swarm Keeper 0.45 Beta EXE

Aug 26, 2012 Swarm Keeper Full Version (211.92mb) 0 comments

A minor update this time. This update makes it easier to create rooms, fixes several bugs and contains various optimizations.

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Half-Life 2: Wars 2.0.0 FULL ZIP

Sep 26, 2012 Lambda Wars Full Version (933.03mb) 17 comments

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Half-Life 2: Wars 2.0.2 FULL 7z

Nov 5, 2012 Lambda Wars Full Version (717.88mb) 14 comments

7zip version, for advanced users only. Use Desura for installing automatic.

Half-Life 2: Wars 2.0.3 FULL 7z
Alien Swarm

Half-Life 2: Wars 2.0.3 FULL 7z

Nov 18, 2012 Lambda Wars Full Version (716.85mb) 5 comments

7zip version, for advanced users only. Use Desura for installing automatic.

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Nov 28, 2012 Lambda Wars Full Version (740.46mb) 5 comments

7zip version, for advanced users only. Use Desura for installing automatic.

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Dec 15, 2012 Lambda Wars Full Version (747.54mb) 11 comments

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Install Instructions: 1. Extract contents into your sourcemods folder (default location: C:\Program Files (x86)\steam\steamapps\sourcemods). 2. Restart...

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Swarm Keeper 0.50 7z

Apr 7, 2013 Swarm Keeper Full Version (180.22mb) 0 comments

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Alien Swarm
Platform
Windows
Developer & Publisher
Valve
Engine
Source
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Official Page
Alienswarm.com
Release Date
Released Jul 2010
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