I would say The legend of Spyro: Eternal night because yes, it was hard. The bosses, the enemies, and everything. -_- I had such a hard time playing it. I love the original Spyro better, but this one wasn't so bad. Well, my old friend borrowed it, never gave it back, and then later said she didn't remember borrowing it. The buck? Anyways, I would also say..Kingdom Hearts as well. Dear god...i had so much trouble on both games, got my ass kicked, etc. But all the hard games seem to be funner more challenges!