This is an idea from the classic game Bomberman. I could suggest making an event - it would be quite simple to implement.
We would need a large box with four corners, where there would be four different teams that could blow each other up.
The setup would be simple: a box made of obsidian with mazes, and redstone torches at the bottom would allow TNT to explode when it's placed - just like in the Bomberman game itself.
The explosive path could be made of wood, dirt, or netherrack.
I think this would be a great idea - I haven't seen anything like it anywhere yet!
