Best selling PC games and May 2009

We have a threefold of Top tens for you today where you can check the best selling games of the last week of May. 

NPD's Top Ten (5/24 - 5/30)
1. The Sims 2 Double Deluxe / EA Maxis / $20
2. World Of Warcraft: Wrath of the Lich King / Blizzard / $39
3. Spore / EA Maxis / $40
4. World Of Warcraft Battle Chest / Blizzard / $40
5. World Of Warcraft / Blizzard / $20
6. Empire: Total War / Creative Assembly / $49
7. Reel Deal Slots Adventure / Phantom EFX / $20
8. Civilization IV: The Complete Edition / Firaxis / $40
9. The Sims 2 Apartment Life Exp. Pack / EA Maxis / $20
10. Left 4 Dead / Valve / $29

Direct2Drive's Top Ten (5/24 - 5/30)
1. BioShock / 2K Boston, 2K Australia
2. Civilization IV / Firaxis
3. X-Com Complete Bundle (UFO Defense, Terror from the Deep, Interceptor, Enforcer, Apocalypse) / Take-Two (Publisher)
4. The Sims 3 (Pre Order) / The Sims Studio
5. Delta Force: Xtreme 2 / NovaLogic
6. Sid Meier's Railroads / Firaxis
7. The Sims 2 Double Deluxe / EA Maxis
8. Civilization IV: Beyond the Sword / Firaxis
9. Civilization IV: The Complete Edition / Firaxis
10. Sid Meier's Pirates / Firaxis

Steam Weekly Top Sellers (by revenue, as of 5/24 - 5/30):
1. Team Fortress 2 / Valve
2. Killing Floor / Tripwire
3. Left 4 Dead / Valve
4. Counter-Strike: Source / Valve
5. Plants vs. Zombies / PopCap
6. The Orange Box / Valve
7. Unreal Deal Pack (Unreal Gold, U2, Unreal Tournament, UT2004, UT3) / Epic
8. Unreal Tournament 3 Black / Epic
9. Assassin's Creed / Ubisoft Montreal
10. Call of Duty 4: Modern Warfare / Infinity Ward