with 3 remotes (main and 2 guest)
5 points to win (in case of mishaps)
weapons: Only the trappeur
all other settings can stay the same
now when it loads up, take one guest account and head to the other one, then line up side by side. Now go with the main account to them and, once you figure out which side to shoot on to kill them both in 1 hit, fire away!
Note*: if you only have 1 remote, you can actually use a guitar hero remote. They count as a player.