GTA: Super Villainy
There are too many bad guys in the world nowadays and only few likes to be the hero. In time, villains are fighting among themselves until one villain destroys the world. Everyone thought that would be the end of things, but that is just the beginning. The idea here is to kill all your enemies. Some of the enemies would drop some coins or even a jewel. You can use the money to buy some upgrade for your character. The game would be harder as you make some progress, better buy those upgrades. Those would come in handy as you further in the game.