FTL. Really any game where blind luck can have as much, or more, influence on your success as your own skill/ choices is capable of driving me up the wall but some games, like FTL and XCOM are just too damn good for me to be put off by that. The actual design of FTL is great, it's unbelievably awesome piloting your own spaceship and exploring the universe and having fights using a cracking combat system. For me all that makes it worth hitting the retry button when it all goes wrong, even though I know odds are it'll end the same way again. Weirdly I don't think I'd enjoy it as much without the stuff that drives me nuts although it doesn't feel that way sometimes.