Farcry 2
Admittedly, i only bought it for the map editor, but the story just didnt have any sort of purpose. You essentially fail the mission straight away, and the malaria/gun jamming bullshit needs to go. Or at least only happen in areas where im NOT under fire from exactly twenty gun totting miltia bastards. Seriously, coming down with the sniffles half way through a particularly tense encounter, only to have my weapon jam straight away afterwards, is a run-up kick square to the testicles.
Ive tried playing it about 10 times now, and each time i instantly loose interest at about the point where it says "tutorial over, go do shit... Well? What are you waiting for?".
Not by any stretch a bad game, its just the over-all aim of the narrative is lost on me, and at that point i just dont see a reason to play. Its essentially a game made up of side-quests.
Just cause 2
Strangely enough, this has the same problem as farcry 2, but a completely different outcome. I still dont really get the over-all goal but, unlike farcry 2, i carried on playing. Probably because it is ludicrous amounts of fun and explosions in one sizzling fiesta of a game. Farcry 2 on the other hand, has nothing apart from the diamond hunting, and being obliterated by ALL humans you see. Seriously, it seems like every single human just wants to kill you.