Spelunky is a platforming roguelike where you have to proceed through harder and harder levels, avoiding traps and killing enemies with the weapons you find lying around. I ragequite regularly. I really enjoyed it for quite a few hours, but it's just too hard. Every time you die it feels unfair, and when you're on a good run, something completely random will kill you. Addictive and pretty well made, but only for the truly hardcore.