Here are the ten top selling titles on Steam for the week as reported by Valve:
1.State of Decay
2.Castle Story
3.Dark Souls: Prepare to Die Edition
4.Total War: ROME II
5.PAYDAY 2
6.Godus
7.Planetary Invasion
8.Saints Row IV
9.Dead Island: Riptide
10.Agarest: Generations of War