The bump in exposure Left 4 Dead received because of its new downloadable content has translated into improved sales. The NPD Group's US PC sales numbers for April 19th to 25th show the zombie co-op shooter's doing well at retail stores.

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. Left 4 Dead (Valve)
5. Empire: Total War (Creative Assembly)
6. Demigod (Gas Powered Games)
7. Company of Heroes: Tales of Valor (Relic)
8. World Of Warcraft (Blizzard)
9. Spore (EA Maxis)
10. The Sims 2 Apartment Life Exp. Pack (EA Maxis)

The rest of the list is the same old story: a few newish strategy games and a whole lot of EA Maxis and Blizzard. No new releases cracked into the top ten this week.