Alien Swarm
Basic Information

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 surface, to a subterranean lava-flooded mining facility.

Along with the game get the complete code base for Alien Swarm that features updates to the Source engine as well as the SDK. Alien Swarm adds 3rd person camera, depth of field, improved dynamic shadows and a wide variety of gameplay additions to the Source engine.

Valve Corporation
Valve Software
Free to Play
July 19, 2010

  • Tactical, 4 player co-op action game with a top-down perspective
  • Complete game code and mod tools
  • Unlock persistent items by gaining levels
  • Over 40 weapons and equipment with countless loadout configurations
  • 4 unique classes and 8 unique characters
  • Matchmaking, Steam Cloud, Steam Stats
  • 64 achievements
  • Tile-based map generation tool
  • Powered by Source and Steam
Screenshots And Videos

About the Game

Starting life as a mod for Unreal Tournament 2004, Alien Swarm's development team was snatched up by Valve to work on mainstream projects like Left 4 Dead and Portal 2. The AS team never forgot its roots however, or its planned Source Engine reboot. So when Valve allowed the team to release Alien Swarm as a standalone free-to-play title, the original creators took the opportunity to refine the project as an engrossing multiplayer experience.

Alien Swarm's straightforward story will sound pretty familiar to anyone who knows the genre. An infestation of oversized alien insects has taken control of a distant human-colonized world. The player is a member of a marine team sent to rescue any survivors and prevent the aliens from spreading further. Additional story points are provided through PDAs scattered across the compounds, although players will be hard-pressed to gather them when endless monster hordes are bearing down at any given moment.

Of course, story isn't really the strength of a game like Alien Swarm. Blowing hordes of hostile aliens to bits is, and on that score, the game is a stunning success. In each level, the players attempt to quickly complete mission objectives while dozens of aliens bear down the team's position. Four classes are available, including Officer, Medic, Special Weapons, and Tech, all of whom must work together to ensure success. An average playthrough will feature several tense firefights and last-second escapes that immerse the player in the game's tense setting. Thankfully, players gain experience points and level unlocks for weapons and gear to help last a little longer against the onslaught.

That's not to say the game couldn't be improved. Three years after release, Alien Swarm still only features a single seven-level campaign. Valve has released a full SDK for the creation of new levels, but unlike its other games, very few community maps are available. Also, considering how Valve multiplayer titles like Left 4 Dead and Team Fortress 2 include single-player options, making Alien Swarm online-only seems like an odd decision.

That said, Alien Swarm is a project of love that's as polished and refined as any Valve product. The game seems lacking only because its core experience is designed so well that players are left craving more. Combine that with Alien Swarm's low price of free, and its hard to deny that Valve have crafted a compelling action-packed title.

System Requirements
  • OS: Windows 7 / Vista / Vista64 / XP
  • Processor: Pentium 4 3.0GHz
  • Memory: 1 GB for XP / 2GB for Vista
  • Graphics: DirectX 9 compatible video card with 128 MB, Shader model 2.0. ATI X800, NVidia 6600 or better
  • Hard Drive: At least 2.5 GB of free space
  • Sound: DirectX 9.0c compatible sound card
  • OS: Windows 7 / Vista / Vista64 / XP
  • Processor: Intel core 2 duo 2.4GHz
  • Memory: 1 GB for XP / 2GB for Vista
  • Graphics: DirectX 9 compatible video card with Shader model 3.0. NVidia 7600, ATI X1600 or better
  • Hard Drive: At least 2.5 GB of free space
  • Sound: DirectX 9.0c compatible sound card
Alien Swarm
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