Your most replayed video games?

What video games have you played the MOST? As in, what games have you played through (So obviously not a sandbox game, something with a completable storyline.), finished, and then replayed more than any other game you've ever played? I have a few.

Geneforge Series- I lost track after the 30th time I played through this series but I have played it an extensive amount of times after that. Honestly its been too much to count.
Dragon Age Origins- 19 times.
I also remember as a young kid I had some math-teaching game where you ran an arcade, I did that story at least 15 times, maybe/probably more.
Oh and Oblivion. I played through that 11 or 12 times.
Then lastly Prototype with about 5 or 6 playthroughs.
I wanna add Battlefront 2 into here too. I played that through a number of times, about 5. Not sure how many though so i'll just leave it at the bottom of this list.
And obviously there's more but that's enough I do think for my list =P