can have just 2v2 free for alls, if u kill your own teamate, just too bad. maybe it was a means to overall victory(team of last man standing gets the point) or u were just strafing everything in sight.
or we can have have our own rules (KTSS), like kill the boar. one team will have a boar and its their task to defend the boar, there will be a clock say 1:30 mins, boar still alive by run down of clock, team with boar wins.
or if boar or boar owner dies, other team wins.
post your own ideas of possible team games within the constraints of the game.