A multi-player-game on Dragon is an unrated game played by more than two unique players, alternately playing Black and White moves in two teams or in one team. The term multi-player-game is often abbreviated on the site with MPG or MP-game.
There are two game-types that classify as multi-player-games:
Team-Go (N:M) = two teams (Black vs White), each team consists of at least one player with N + M > 2
Zen-Go (N) = one team with an odd number of players alternating Black and White with N > 2
The most common form of a MP-game is Rengo or the officially played Pair-Go, both being special forms on Dragon's Team-Go.
Restrictions for MP-games:
The game is always unrated.
The players must be unique per game, so no player can join a MP-game more than once.
All players must have a valid rating to calculate average ratings of the teams even though all MP-games are unrated.
At maximum 16 players can participate in a MP-game.
Double games, fair-komi, the opponents page and Tournaments are NOT supported with MP-games.