Here are the ten top selling titles on Steam for the week as reported by Valve:
1. Middle-earth: Shadow of Mordor
2. Borderlands: The Pre-Sequel
3. Alien: Isolation
4. Counter-Strike: Global Offensive
5. Sid Meier's Civilization: Beyond Earth
6. Life is Feudal
7. DayZ
8. Styx: Master of Shadows
9. Kerbal Space Program
10. NBA 2K15