GTA IV - Crap main character,annoying stereotype friends,dull story and crap controls.Gave up about three quarters of the way through the story and never went back
FarCry 2 - Bloody respawning enemies,enemies who attack on sight even when you're working for their faction,shitty weapons which jam after a couple of shots(funny how they never jam when the enemies are using them),massive empty map which takes age to get anywhere,driving anywhere means you have to pass through at least 3-4 checkpoints full of enemies who attack on sight,malaria which forces you to do shitty side missions,having to sit through those same bloody animations(pulling bullets and fixing cars)constantly.I'm sure there is more I'm leaving out.Put about 10 hours into the game and then traded it in
Half Life 2 - Just couldn't see what was supposed to be so great about this game.Put a couple of hours in and then quit out of boredom
Viking:Battle for Asgard - Got stuck on the final boss which is a shame as it's a game I quite enjoyed