42 games and the last one I got doesn't work nor have I even looked at it yet. So the other 41 all work as they should. Sure every once in a while I'll have a game with an issue but it's usually minor.
Every game that comes in gets completely torn apart and gone through. Typically never have any issues after that. TZ was an exception, but it's been sorted out for several years now.
Large collections don't intimidate me.