Far Cry 2
The Dunia Engine was built specifically for Far Cry 2 by the award-winning Ubisoft Montreal development team. It delivers the most realistic destructible environments, amazing special effects such as dynamic fire propagation and storm effects, real-time night-and-day cycle, dynamic music system, non-scripted enemy A.I. and so much more.
The extra power on offer from the HD 5770 does a good job of making Far Cry 2 playable at 1920 x 1200 with the in game settings at very high. You can see the HD 5750 does struggle slightly at this resolution. It's always nice to see the next model up be the difference between a game being smooth and a little chunky.