I played KOTOR 2, Fallout 3 (with the expansions so I can play beyond the end), Halo 2, Metal Gear Solid 4, and the worst ending I've seen is Dead Rising. I beat the first mode, then Overtime mode, and then the really tank battle that felt like it was lifted straight from Call of Duty on Veteran and the impossibly hard melee boss battle you had to be at level 50 for, and I was! The ending was a real let down. I spent so much time hacking zombies and such I thought the true ending was going to be an epic ending. It wasn't epic at all. Having to read the end? Wouldn't a tv news story be more fitting?