Bohemia Interactive's military shooter ArmA II only started on Steam's download service last Friday but sales were high enough to put it on top of the sales list for Steam for the last week. Second place went to Overlord II, the fantasy RPG-strategy from Codemasters. Here's the rest of the list for the week ending June 28:

1. ArmA II - Bohemia Interactive
2. Overlord 2 - Triumph Studios/Codemasters
3. Empire: Total War - The Creative Assembly/Sega
4. Left 4 Dead - Valve
5. Prototype - Radical Entertainment/Activision
6. Counter-Strike: Source - Valve
7. Team Fortress 2 - Valve
8. Killing Floor - Tripwire Interactive
9. Empire Total War: Elite Units of the West (DLC) - The Creative Assembly/Sega
10. Dawn of Discovery - Ubisoft