Let’s get straight to the point; Valve, makers of the Half Life series, Counterstrike, Team Fortress 2 and Portal have released a new game. The name of the game is Alien Swarm. It’s really good, and what’s more; it’s absolutely free.

Alien Swarm was originally a fan made mod for Unreal Tournament, and is now a standalone Steam-based game. It’s an almost-top-down 3D shooter with up to 4 players working in cooperation.

Each player gets to choose from 4 classes; Officer, Weapons Specialist, Tech or Medic. The officer is pretty solid in battle, but their main bonus is stats that will boost team performance, so you can do without an officer on a 1-2 man team. Weapons Specialists get boosts to their health and…