Here is a collection of Quake 3 Arena multiplayer mods I have made.
When a player dies, they drop a pokeball. Pokeballs can be collected and cashed in for points. The player who cashes in enough pokeballs wins. Multiple pokeballs can be cashed in for a point multiplier.
One player randomly starts with the "hot potato" (the plasma gun), everyone else starts with non-damaging gauntlets. The player with the hot potato will take damage until they pass the hot potato to another player (by hitting them with a plasma bolt). The last player standing wins.
One player randomly starts as a zombie, everyone else is human. Eaten human players become zombies. The last human standing wins.