This is a custom map, meant to be played on multiplayer with at least 4 people, 2 on each team. This is a standard capture-the-flag game mod: you are not allowed to place blocks, except if rebuilding something that was destroyed by tnt, the only way you are allowed to detonate tnt is shooting it from a tnt cannon, The only way you are allowed to break stuff is with your fists, otherwise you would just diamond-pickax in. Before starting the battle, wait for sun-set and sleep, so that you can re-spawn there. Also, there are a few extra rules:
don't move away more than 20 blocks from the battlefield
play with hostile mobs ON (optional)
the flag is on the top of the tower. don't camp there!