Pac-Man world 2, volcanic Panic was the bane of my childhood. Never got past it until just recently in fact. Others are: Rayman Origins, collecting everything including achievements BattleBlock Theatre on Insane Mode LittleBigPlanet 1, the temples and wilderness were very difficult at the time, especially acing them to get all prizes. [spoiler]Looking at you BUNKER![/spoiler] Oh yes, Fallout 3 was also quite difficult at the start. Though I got a lot if advice from people so it was ok. Lastly, couldn't forget Halo on Legendary.