Set up a bridge that must be at least 8m long and wide enough to accommodate four fighters in the front row.
Starting at one end and working towards the centre of the bridge, the bridge should narrow to create a funnel effect. The narrowest part leaves room for only two fighters in the front line.
The number of fighters in each team is free, depending on the difficulty required.
You need to set a respawn condition (time limit, run to a given point and come back, etc). You can also decide that only one of the two teams has the respawn bonus.
How it works :
When a combatant is killed, he/she leaves the bridge in such a way as to cause as little disruption to the fighting as possible and must fulfil the chosen Respawn condition.
To win the game, you have to kill all the fighters on the opposing team.
It's a good idea to switch roles regularly, every two or three games for example.