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.

Grab it Here or search for it on Steam.

About the Game

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.

• 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

System Requirements

Minimum + Recommended

• • 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

You Can get this game from http://www.torchlightgame.com as a demo and if you hurry, you can buy this game for $5 – Bargain.

CTF Edition (June 17, 2008):
Download for Windows – 292 MB
Download for Linux – 301 MB
Download for MacOS X – 306 MB

Best way to describe this game – a Freeware Single/Multi Player that is a lot like Doom or Quake. There is also a Server lister and many maps & Add-ons for this from various sources.

Sauerbraten

It can be run inside a window, full screen or anything inbetween and I personally think it is great, the AI is not that hot and easy to pick off the enemies on single player but it’s fun none the less.