NeonForge
Combat · command

pvp

Player against player: where it's allowed, and your record.

Usage:
  pvp

Players can fight each other in the wilderness and in PvP zones (rooms
say so in red). Cities, the tutorial and the sewers are safe. Nobody
under level 10 fights other players, nobody attacks someone more than
5 levels below them, and you can't attack your own party or clan.
Losing works like losing to a creature: you black out and wake up
somewhere safe with everything you had. Use kill <player> to start.

Examples:
  pvp
  kill Nyx          (where PvP is allowed)

In the game, help pvp shows this too.