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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Reactive Drop 1.20 Full

Reactive Drop 1.20 Full

Alien Swarm: Reactive Drop Full Version 5 comments

Full latest version. Delete old version. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam. If you use Laucher app there is no need for this...

Rifle Mod Server DLL 2016.05.04

Rifle Mod Server DLL 2016.05.04

Alien Swarm: Rifle Mod Full Version

Extract it into Alien Swarm\swarm\bin. Use console commands to activate game modes in each round. rm_mod 0 - classic Alien Swarm, rm_mod 5 - Solo Player...

Reactive Drop 1.19 Full

Reactive Drop 1.19 Full

Alien Swarm: Reactive Drop Full Version 1 comment

Full latest version. Delete old version. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam. If you updated using patches there is no reason...

Reactive Drop 1.17 to 1.19 Patch 2

Reactive Drop 1.17 to 1.19 Patch 2

Alien Swarm: Reactive Drop Patch

This patch adds Silent Corridors campaign and resolves issues with Antlion Guard. Requires 1.17 or higher version installed. Extract this archive into...

silenced weapons (vpk file)

silenced weapons (vpk file)

Alien Swarm:Silencer Mod Full Version

Thanks for Geotavros' help, the vpk version is released.

Reality Arms MOD

Reality Arms MOD

Reality Arms MOD Full Version 2 comments

Here is the download, enjoy it! To install it please read Help.txt in the pack.

AS Enhanced IAF

AS Enhanced IAF

Enhanced Interstella Armed Forces Full Version

Nothing special, download and extract it as a new game. Start Steam then start swarm.exe. More information in READ ME.txt, please read it before playing...

Reactive Drop 1.17 to 1.19 Patch

Reactive Drop 1.17 to 1.19 Patch

Alien Swarm: Reactive Drop Patch 2 comments

Adds updated version of Biogen Corporation, restores medgun functionality, improves onslaught hordes, fixes bugs and improves some maps. Requires 1.17...

Serious Swarm Marines Patch 13.1

Serious Swarm Marines Patch 13.1

Serious Swarm Marines Patch 3 comments

revision 13.1 | New update on mod Serious Swarm Marines, have fun. :)

Serious Swarm Marines

Serious Swarm Marines

Serious Swarm Marines Full Version 6 comments

revision 12.1 | New mod for Alien Swarm so much models and other, have fun. :)

Rifle Mod Server DLL 2015.10.06

Rifle Mod Server DLL 2015.10.06

Alien Swarm: Rifle Mod Full Version

A bunch of cvars for server administrators to set up default game rules.

Rifle Mod Server DLL 2015.09.29

Rifle Mod Server DLL 2015.09.29

Alien Swarm: Rifle Mod Full Version

Added infinite spawners, slow motion disabler, improved marine's knockout feature, fixed some bugs.

Rifle Mod Server DLL

Rifle Mod Server DLL

Alien Swarm: Rifle Mod Full Version

This version contains a fix that crashes clients when they use ECA

Rifle Mod Server DLL

Rifle Mod Server DLL

Alien Swarm: Rifle Mod Full Version

Several fixes and features were added to Rifle Mod server. Now you can host a server to be like regular Alien Swarm server with game fixes included.

Reactive Drop 1.17 to 1.18 Patch

Reactive Drop 1.17 to 1.18 Patch

Alien Swarm: Reactive Drop Patch

Adds new green skin for Antlion Guard, new map Nest Rapture, new challenge Difficulty Tier 2. Requires 1.17 version installed. Extract this archive into...

v3 Full

v3 Full

Swarm Director 2 Full Version 5 comments

v3 is finally here, with a heap of bugfixes and new features.

Reactive Drop 1.17

Reactive Drop 1.17

Alien Swarm: Reactive Drop Full Version 4 comments

Delete old version. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam. In this version you'll see bug fixes, map improvements, new map Nest...

Chaos Swarm Marines Red Edition

Chaos Swarm Marines Red Edition

Chaos Swarm Marines Full Version 3 comments

There new custom mod red edition special for chaos swarm marines and moddb, revision 7.3

Chaos Swarm Marines

Chaos Swarm Marines

Chaos Swarm Marines Full Version

There new mod chaos swarm marines, revision 7.3

v2 Incremental Update 4

v2 Incremental Update 4

Swarm Director 2 Full Version

An incremental update to v2 containing new features and bugfixes. Compatible with v2 through v2 Incremental Update 3.

Space Swarm Marines v8.1 (update)

Space Swarm Marines v8.1 (update)

Space Swarm Marines Patch 1 comment

Well done i fixed more models and animations. :)

v2 Incremental Update 3

v2 Incremental Update 3

Swarm Director 2 Full Version

An incremental update to v2 containing new features and bugfixes. Compatible with v2 through v2 Incremental Update 2.

v2 Incremental Update 2

v2 Incremental Update 2

Swarm Director 2 Patch

An incremental update to v2 containing new features and bugfixes. Compatible with v2 and v2 Incremental Update 1.

v2 Incremental Update 1

v2 Incremental Update 1

Swarm Director 2 Patch

An incremental update to v2 containing new features and bugfixes. Compatible with v2.

Space Swarm Marines v8.0

Space Swarm Marines v8.0

Space Swarm Marines Full Version

Well done, release ready and now all can downloading.

v2 Full

v2 Full

Swarm Director 2 Full Version 2 comments

v2 adds per-player first person, an even more powerful director, ASB2's spawn lists, player2k's Better HUD Mod, new entities, and bugfixes for several...

Reactive Drop 1.13 to 1.16 Patch

Reactive Drop 1.13 to 1.16 Patch

Alien Swarm: Reactive Drop Patch

Requires version 1.13 installed. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam. This update adds Antlion Guard from HL2 which spawns...

Reactive Drop 1.13 to 1.15 Patch

Reactive Drop 1.13 to 1.15 Patch

Alien Swarm: Reactive Drop Patch

Requires version 1.13 installed. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam

Reactive Drop 1.13 to 1.14 Patch

Reactive Drop 1.13 to 1.14 Patch

Alien Swarm: Reactive Drop Patch

Requires version 1.13 installed. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam

Reactive Drop 1.13

Reactive Drop 1.13

Alien Swarm: Reactive Drop Full Version

Misc fixes, weapon balancing for pvp, see changelog. Delete old version. Extract to <path to steam>\SteamApps\sourcemods. Restart Steam