KOTOR 1!
I still remember being shocked when you found out you were Darth Revan. The story, mechanics, and music were all top notch. It's one of those games I still have to replay at least once a year.
there's no denying that KOTOR1 was very impressive which is y i believe ME2 is right up there with it and maybe beyond. a game which makes u keep coming back for more deserves credit and respect and i believe ME2 has certainly earned that.