Steam's latest free weekend event is Call of Duty: Advanced Warfare. The multiplayer portion can be downloaded for free starting now and through 1pm PST on Sunday. You can play it for free until then.

Steam users will be able to access the multiplayer portion of Call of Duty: Advanced Warfare for free until Sunday 1pm PT. If you end up getting hooked, you can proceed to pick the complete game ...

Call of Duty: Advanced Warfare by Sledgehammer Games is the top-selling title so far for 2014. The free-to-play multiplayer of the game will last until Dec. 14, 1 p.m. Pacific Time.