Nintendo has started offering C64 titles on the WII, and one of the launch titles are one of my all time favorite games, The Last Ninja. I just spent way too much time getting through that swamp. If you don't know what it's all about, you can check out this long play video.
Another launch title is International Karate, which was arguably my first exposure to Versus Fighting Games, a category that have consumed more of my time than any others, with game series like Street Fighter and Tekken. I did buy Street Fighter IV when it was released on friday, but it hasn't been able to wrestle my attention away from Tekken V Online.