Mizu you should also look at Far Cry 2. In the game there's a 50 KM free roam environment of Africa, map editor, and you might like this. You can approach any mission any way you want, If you want to destroy everything you're free to do it. Want to silently kill everyone without making that much sound, you're free to do that. Want to distance yourself from your enemy, you can snipe your enemies. You can go around anyway you want on missions. You should keep track of Far Cry 2, One of the best shooters is being made(as of now). That and
Dead Space. Mizu you should keep track of these games their very good.