Games I have beaten
I haven't beaten some of the games I own, usually because of lack of time and interest, the bigger problem is, that most of them can't even be beaten (Civ 4, WoW etc.). This is my humble list of those that I have actually completed.
I didn't include any guitar hero or rock band games, even though on most of them I do have all expert songs on guitar 5 starred and both Rock Band Band World Tours fully finished. I just don't think they're the games that you can ever consider beaten.
Definitely missed something, but I think these are most the games I have completed.