Here are the ten top selling titles on Steam for the week as reported by Valve:
1.Divinity: Original Sin
2.DayZ
3.Counter-Strike: Global Offensive
4.Trails in the Sky
5.Age of Empires Legacy Bundle
6.ArcheAge: Silver Founders Pack.
7.The Forest
8.ArcheAge: Archeum Founders Pack on Steam.
9.Space Engineers
10.Garry's Mod
