Oh that’s brilliant!
Here’s a novel shoot-out method to decide a game: Using only the Goalkeepers, let each of them alternate kicking the ball at the unguarded opponent’s goal from their own Penalty area they can do a free kick from the turf or punt the ball, whatever they want. The only other provision is that their kick must first re-touch the ground in the opponent’s Penalty area (no “slow-roll” across the field). Take as many attempts as needed to determine the winner.