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Play Alien Swarm

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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:

    • 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

    Recommended:

    • 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
Helpful customer reviews
208 of 227 people (92%) found this review helpful
807 products in account
17 reviews
23.4 hrs on record
From what I can remember, playing this was really fun. A top down co-op alien shooter done correctly - complete with maps to draw penises on. The only downside was how short it was. Then again, it is a free game.
Posted: November 25th, 2013
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189 of 255 people (74%) found this review helpful
143 products in account
22 reviews
1,337.1 hrs on record
The best co-op game.
Posted: November 25th, 2013
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58 of 64 people (91%) found this review helpful
62 products in account
12 reviews
12.5 hrs on record
When I played this game I had a great time. Hope the community comes back when the fps mod comes out. Wish this had workshop and if it did it would still be played constantly to this day.
Posted: November 26th, 2013
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24 of 25 people (96%) found this review helpful
81 products in account
9 reviews
25.4 hrs on record
Great game. I love the 3D isometric view (Diablo 2 style, but 3D), the team aspect, diferent weapons, upgradeable players/equipment, etc. Download it now, and play a game with me! And join The Big Bug Resistance group...we're taking it back!
Posted: February 11th, 2014
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10 of 10 people (100%) found this review helpful
58 products in account
16 reviews
482.8 hrs on record
Such a small game, but HUGE in it's story and atmosphere. Best "free to play" game I've ever encountered.
Posted: January 30th, 2014
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