What feels better than finally completing part of a game you thought youd never do in a million years? Nothing, thats what. That sweet, sweet release of endorphins that our brain gives us when weve just defeated an otherwise-impossible boss or finished the most difficult level - or even just gotten the achievement thats been evading us for so long - theres no sensation quite like it. Although some people can go above and beyond what most of us mere humans can do - no normal person is going to be able to beat invisible Tetris or beat Super Mario World blindfolded, both things that have happened - there are some incredibly tough gaming challenges out there within the realms of feasibility for everyone else. That being said however, while it might be supremely satisfying to take them on and complete these incredible challenges, be warned; they wont let you off easy. If youre going to tackle these monsters, then youre going to need all your skill and all your knowledge with a sprinkling of luck just to be sure. Even then youll still fail more often than not, but that's what makes breaking through to the other side victorious so special. As youll see for yourself, these titles do not mess around.