What are the best-selling games per system in America, Japan, and Europe this week at Amazon? Wii Fit stays on the healthiest spot of the Wii chart. NCAA Football 09 stays on top of the PS3 chart. PS3 exclusive Metal Gear Solid 4 remains at the top. Warcraft III Battle Chest debuts on the PC's top spot, as well as Final Fantasy IV debuting on the DS chart.