CLIENT

Free on Steam: Quake Champions. Bethesda account. You cannot paste an IP — you queue. Pick a champion, then Duel or a team mode. Ability key is the extra button on top of the Q3 weapon set.

In-client queues (Liquipedia): Duel, TDM 4v4, Clan Arena 4v4 / 2v2 / 1v1, Sacrifice, Slipgate, CTF, Instagib, FFA.

Read the HERO PRIMER before you queue — weight class is the whole kit.