- Shooter
Game
Alien Swarm
Alien Swarm is a game and Source SDK release from a group of talented designers at Valve who were hired from the Mod community. Available free of charge, the game thrusts players into 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 surf
About Alien Swarm
- Released
- July 2010
- Developer
- Valve
- Engine
- Source
- Platforms
- PC (Microsoft Windows)
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
- Mods99A mod changes the game itself. It needs something to load it, it may need other mods first, and it only works on the versions its author built it for.
- resource packs3A resource pack replaces the textures, sounds, models and language files the game ships with. It changes nothing about the rules, so it is safe on a vanilla server.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsAlien Swarm update releasedFixes and Updates Security fixes to client/server file transfers Fixed "Out of thread ids" error when launching Alien Swarm on a computer with 32 or more logical processors Updated localization files
- Product UpdateAlien Swarm Update- Added latest localization files. - Fixed a crash when viewing the Achievements screen in a non-English language.
- Product UpdateAlien Swarm SDK Update- Added shader source code. - Matchmaking system supports mods with more than 4 players. - Mods store their config.cfg separately from the base game.
- Mods indexed
- 102
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
Most popular
This source publishes no download figure, so these are ranked by how many people saved or subscribed to them.
- IsolationMaps / Campaign
- Tears for TarnorMaps / Campaign
- HoldoutMaps / Campaign
- asi_deathmatch_1Maps / Other/Misc
- Awesome smiley emoteGUIs / Other/Misc
- Spygas's missionV5Maps / Other/Misc
- Holdout_prMaps / Other/Misc
- Heat StrokeMaps / Campaign
- Nepumax' Colorful MarinesSkins / Other/Misc
- Ground ZeroMaps / Campaign
- Woodland HoldoutMaps / Other/Misc
- Extermination v1.5Maps / Campaign
- SurvivalArena (v:1,6 of 30.04)Maps / Campaign
- Alien Swarm Dock IconGUIs / Other/Misc
- Paranoia : Episode 1.Maps / Campaign
- Marine Defense - Alley DefenseMaps / Other/Misc
- City 17Maps / Campaign
- robot-1Skins / Other/Misc
- ExpanderCampaignMaps / Campaign
- SiropDeCeriseMaps / Campaign
- Victory Mine Reinfested HoldoutMaps / Other/Misc
- The titanicMaps / Campaign
- Parking Garage Survival b2Maps / Campaign
- Paranoia : Episode 2.Maps / Campaign
Browse all 99 Alien Swarm mods Sortable by downloads, rating and date.
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Why Alien Swarm mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Alien Swarm mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.