ON *:TEXT:!join:#ircgames: {
  set %bfstart  [ $+ [ $nick ] ] 1
  notice $nick You've joined a Game of Battlefield! | inc %bfstart [ $+ [ $nick ] ] 1 
  if (%bfstart [ $+ [ $nick ] ] > 1) { notice $nick You are already in a game! type !part to part | halt }
}
ON *:TEXT:!part:#ircgames: {
  unset %bfstart [ $+ [ $nick ] ]
  notice $nick You've parted the game. 
}