Steam's Weekly Top Sellers

Here's Valve's report on the top 10 bestselling titles on Steam for the past week

1.Sid Meier's Civilization V
2.Fallout New Vegas: Old World Blues
3.Terraria
4.Dead Island
5.GRID
6.Call of Duty: Black Ops Annihilation Content Pack
7.Left 4 Dead 2
8.The Witcher 2: Assassins of Kings Digital Premium Edition
9.Counter-Strike: Source
10.Super Street Fighter IV Arcade Edition