Here is this weeks top ten Arcade games downloaded from Xbox Live Marketplace.

1 Wits & Wagers
2 UNO
3 DOOM
4 Brain Challenge
5 Ikaruga
6 N+
7 Bomberman LIVE
8 Worms
9 Assault Heroes
10 Sonic The Hedgehog 2

The above list is based on full versions purchased.

Source