If it had inverted mouse option I would've donated. The frustration of seeing a hole above/below me and trying to patch it by looking the opposite direction every single time is apparently more frustrating than the devs can understand. it ruins the experience and is probably why the majority of games include it option. The usual thing would be to turn the game on, try to look around, get a little dizzy, look for invert, if there is an option continue the game. if not uninstall game and move on.
so i feel like i should start saying something to let people know that most people dont feel like asking for an invert option. sooo... please include an invert option before releasing a game please?