The ninth day of Xbox Marketplace holiday deals rings in several Sonic the Hedgehog discounts. The blue mammal's escapades in Sonic 4 and Sonic Adventure are 320 MSP ($4) each, a 60 percent savings, and his Genesis games are down 60 percent, at 160 MSP ($2) apiece.

The discounts are only available today, so run and catch 'em before they're gone -- just don't run like an idiotic Sonic.