Half-Life 2, Mortal Kombat Deception, Halo 2, Unreal Tournament 2004, Madden 2005...those are just off the top of my head, there are several more.
At first I thought this was a good idea when I got UT2k4, the extra stuff included with that was actually useful, but it's spreading a little too much for my liking. How long is it before we start seeing stuff like Army Men special editions?
Does anyone even care about the extra stuff or do you just want the game?
Isn't Konami in the process of making a karaoke game where you actually sing into a mike and they rate you on timing and pitch? On some of the karaoke machines they do have some rating system and competition mode where you sing against another person.