#14 Just Cause 2
If you've ever wanted to experience what it'd be like to play Venture Bros' Brock Samson, then Just Cause 2 is just the game to let you do it by putting you in the role of the very Samson-like Rico Rodriguez, a secret agent/daredevil.
You're free to roam the fictional island nation of Panau, that's loosely based on South East Asia. It's even as big as any island you'd actually visit in real life thanks to the game's engine.
Instead of just running around on foot, you're free to drive all sorts of vehicles in addition to having access to a parachute and a grappling hook that are always ready to be deployed. The sky is literally the limit with what you can do in Just Cause 2.