An idea:
Drivers Versus Runners!
The concept:
As a driver your job is to run the runner over with your vehicle, and as a runner you have to try to run and dodge the cars trying to hit you. There would be different maps too like one being in a huge indoor warehouse, and another being in a city, and another being in a gigantic freezer. If all runners die or get killed, then the drivers win the round and the drivers earn points. If the drivers all died, then the runners would win the round and earn points. In each of the maps, there would be explosive 1x1 bricks lingering around the map, and they'd only have an effect on the drivers. If the driver touches the brick with his or her car then the vehicle would explode and the driver dies. Every round would be timed, meaning you'd had a certain amount of time to dodge these cars and/or run these people over.
I hope you can use my idea!