GTA: Monster Frontier
Around 1000 years ago, there was a terrible war that destroyed the planet. It is between the human race and the monsters. Eventually the human race won, but it come at a terrible price. Now, the human are the master of the monster and they need to work together to conquer another world to live in. The game is played with a mouse. You need to train your monster to toughen it up. You earn money if your monster win the battle. At the start, you control one monster, but eventually, you'll take control of other monsters.