For today only, you can grab Sonic’s various Xbox Live Arcade titles at a discounted price as part of Microsoft’s Countdown to 2011 deals.

The full list of games and prices are:
Sonic the Hedgehog 4: Episode 1 Was: 1200 Now: 800 (33% off)
Sonic the Hedgehog 3 Was: 400 Now: 200 (50% off)
Sonic the Hedgehog 2 Was: 400 Now: 200 (50% off)
Sonic the Hedgehog Was: 400 Now: 200 (50% off)
Sonic Adventure Was: 800 Now: 400 (50% off)
Sonic & Knuckles Was: 240 Now: 120 (50% off)

Unfortunately, Sonic Adventure‘s DLC isn’t included in this sale like it is in the PSN discounts. If you’re interested in Avatar items, the Sonic & SEGA All-Stars Racing themed Sonic car prop has also received a 50% discount for today only from 240 Points to 120 Points.

Remember, these deals are available for today only, so grab them while they’re there.