for me Halo: Reach is still taunting me... apart from the bits i played at RAGE i still need to give the game a proper playthrough but the xboxlessness is hurting.

Medal of Honor, because i want to try it for myself

Need for Speed: Hot Pursuit, always loved the nfs franchise although i avoided it during the carbon, pro street, undercover era...

and while not released this year i also still need to play

Halo 3 odst and uncharted 2