Anyone heard of Far Cry?
That looks like it will rock my world

Far Cry is a blast. In my opinion its the best first person shooter of the year. The graphics and lighting effects are simply amazing. The graphics are awfully demanding though. The multiplayer is fun as well if you play objective style maps. The multiplayer reminds me of Team fortress for half life but with better rendering. The single player isnt repetitive at all, actually its full of surprises you get to beat the level anyway you can. The maps are huge as well.