Well, you need a way to stop the enemy team. Otherwise it's just a race there and back. And if the enemy has thd flag and you have theirs it doesn't end unless you can eliminate the flag carrier. A way to do this is tagging, tackling, or paintball. Each team is safe in their own home base because that's where they are sent when they get tagged the middle ground or in the enemy base if they're tagged they get sent home then can start again. Getting the enemy flag to your base with your flag still Iin your base and making the two flags touch is how you win.