NPD Group je izdal seznam dvajsetih najbolje prodajanih PC iger v ZDA za maj 2009:

1. World of Warcraft: Wrath of the Lich King (Blizzard)
2. The Sims 2 Double Deluxe (EA Maxis)
3. World of Warcraft Battle Chest (Blizzard)
4. World of Warcraft (Blizzard)
5. Empire: Total War (Creative Assembly)
6. Spore (EA Maxis)
7. Left 4 Dead (Valve)
8. The Sims 2 Apartment Life (EA Maxis)
9. Fallout Trilogy (Black Isle Studios)
10. StarCraft: Battle Chest (Blizzard)
11. World of Warcraft: Burning Crusade (Blizzard)
12. Demigod (Gas Powered Games)
13. Real Deal Slots Adventure (Phantom EFX)
14. The SimCity Box (EA)
15. Fallout 3 (Bethesda)
16. Diablo Battle Chest (Blizzard)
17. Elder Scrolls IV: Oblivion GOTY (Bethesda)
18. Warcraft III Battle Chest (Blizzard)
19. Warhammer 40K: Dawn of War II (Relic)
20. Company of Heroes: Tales of Valor (Relic)