This deal has expired!
Free video games are always a welcome sight! Valve, the developer that has brought us big titles such as Half-Life, Portal, Team Fortress 2, and Left 4 Dead, has released a new game for free. It's called Alien Swarm
-- a top down 3D shooter where you fight your way through, wait for it... swarms of aliens. It's squad based, and supports up to 4 players in cooperative multiplayer action. There are persistent items to be unlocked by gaining levels and over 40 weapons -- pretty swanky for a free game.
The Onion A.V. Club
rates in an "A" while Destructoid
gives it a 7.5/10, calling it "an enjoyable shooter at an absolute steal of a non-price." We'll take it!