Sonic's Ultimate Genesis Collection is definitely one collection that is worth buzzin'. Plus you can get yourself an easy 1000 gamer points for playing anywhere from one to twenty-percent of the full title. By unlocking certain Achievements, you'll also unlock any one of the nine Sega Master System titles. There are several developer interviews to unlock, so you can learn more about the parents of modern day gaming.
If you grew up on the Sega Genesis and Master System, then Sonic's Ultimate Genesis Collection is one title you'll want to own this year.