[2021] play against a friend?

There is the KYF (kill your friends) function in the game if you mean that?

Originally posted by Meta: yea either KyF or if you are lucky enough you get into a public lobby with him. But honestly: whenever I have people who know eachother they usually team up and kill everyone and then farm points which is really annoying..

and that exact scenario would also be against the rules if anyone teams up with the killers to grief others.