The NPD Group today announced the North American PC game sales rankings for the week of May 11th to May 17th. Once again, "The Sims 2" latest expansion pack "Kitchen & Bath" topped the chart. Besides the strong sales of "The Sims 2", "World of Warcraft" also remained highly popular in North America. The biggest change this week compared to last week was "Crysis" re-entering the TOP 10. Other rankings remained unchanged. The PC game sales chart continues to be dominated by EA and Blizzard.