Space and laser guns feature prominently in this week's PC sales
charts, last week's consumers opting for aliens and bright-coloured
uniforms over olive-grey outfits and the real world.

Least, they did on the whole. You have to overlook Bad Company 2 at
the #1 spot
on Steam if you want to think sci-fi games dominated the entire
charts. But look at Mass Effect! It's there six times on only two
charts.

PC Digital Download Charts For The Week Ending February 6, 2010

Steam

1. Battlefield: Bad Company 2 Limited Edition
2. Global Agenda
3. Mass Effect 2
4. Call of Duty: Modern Warfare 2
5. Aliens vs. Predator
6. Mass Effect 2 Digital Deluxe Edition
7. Titan Quest Gold
8. Left 4 Dead 2
9. Star Trek Online Digital Deluxe Edition
10. Mass Effect

Direct2Drive

1. Star Trek Online Digital Deluxe Edition
2. Star Trek Online
3. Battlefield: Bad Company 2 Limited Edition
4. Mass Effect 2
5. Mass Effect 2 Digital Deluxe Edition
6. BioShock 2
7. Stargate Resistance
8. Mass Effect
9. Civilization 4 Complete
10. Red Faction: Guerrilla

[Shacknews via Kotaku]