After a poor, not-even-in-the-top-10 opening week for the XBLA version of Sonic Adventure, some worried that Sega might lose its interest in bringing more Dreamcast classics to the platform. However, it seems that contrary to the nature of its blue, pointy protagonist, Sonic Adventure is just a slow starter -- it placed fourth in this week's top Arcade sales. Dead Rising 2: Case Zero held down its spot at the top of the list, while DeathSpank: Thongs of Virtue managed to debut in second.

Halo: Reach managed to wrestle the top spot on the Xbox Live Activity chart from Modern Warfare 2 -- where it will likely remain for a good long time. At least, until Call of Duty: Black Ops makes a run for the throne. Ooooh, this is going to be so exciting! Check out the full Xbox Live weekly rankings after the jump.