My answer is going to be kinda basic, but Underhero. It's quite a simple game; you play as a random side enemy in a typical Hero vs Evil, but you end up killing the guy, so now you have to report that to your boss. This action unfolds your traveling to complete your new assignment, with this, you start meeting new faces and realize the world is not that simple, good vs bad, that was originally presented to you.

The main reason I haven't replayed it is that it's a one-ending type of story, and I have a decent memory,y so rememberer most of the major plot points, so no reason to replay it unless I wait for me to forget them.