Alien Swarm

Alien Swarm is a 4 player co-op video game developed by Valve for the steam network where it was released on the 19th of July, 2010.

As players progress through levels, they gain experiences and levels which allows the players to unlock new features and items. This enables players to master the battlefield.

There are four classes in Alien Swarm:

1. Officer
2. Special Weapons
3. Medic
4. Tech

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