I'm trying to learn about applying agile methodologies to game development. But seems to be impossible to find real life examples.

What I am looking for are things like;

1. Initial user stories
2. Final user stories (complete, covering the entire game requirements)
3. Acceptance criteria
4. Task list
5. Sprint backlogs (before and after each sprint)

The agile books seem to have some limited examples, many of which seem contrived. In this era of open source software, there must be an documented example of the process applied to a game that is publicly available.

I am asking specifically about games because they are so different from normal applications. Regular applications are built to all users to complete specific tasks in order to get stuff done(book a room, print a report etc). People play games for much less tangible reasons, so I think the process is significantly different.

[it doesn't have to be scrum, it could be any process, just needs to be a real life example game and be reasonably complete]