An interesting and different idea I had would be a game that takes place in the jungle/forest. You would pick a predatory animal to play as, like a panther or a hawk. You would roam the jungle and search for prey to hunt. It would be very stealth based. Surprise is the best weapon in a hunt. You want to get as close as you can without being seen or heard before you stike, to have the best chance of your attack being successful. And you would want to pick a good angle of approach, taking the terrain into account. Also you would have to use some tracking skills to find the prey; knowledge of habitats and gathering areas, finding the "trail" of where an animal has recently been, maybe some type of smell-o-vision for the hunters with a keen nose (or tongue for snakes). And there could even be a coop multiplayer mode for the pack animals. Which gives me a geat idea. An unlockable character could be the velociraptor, which of course would be available for coop, and would allow you to hunt humans. "Clever girl." Heck there could even be a whole dinosaur mode, where you are in a prehistoric landscape hunting other dinosaurs. Thats actually a good idea to have several different zones/maps to play on with for the different animals to go with each; jungle, woodland, savannah, desert, mountain, marsh, and dino-land.