read "The number of players can be between 2 and 256"
From the command reference:
CREATE NET GAME
This command will create a multiplayer net game. The Gamename describes the name of the game and will
be the name of the session when the game begins. The Playername is the name you wish to give the initial
host of the game. The number of players can be between 2 and 256, and sets the maximum number of
players that can join the net game. You can optionally specify a flag which controls the type of net game
created. A value of 1 is the default and specifies a Pier to Pier game, where a value of 2 specifies a
Client/Server game. A Pier to Pier game has every computer communicate with each other. A Client/Server
game has all player traffic routed through the host computer and then broadcasted to the rest of the
players. You will need to set a connection before you can create a net game, however this command will
automatically select the first connection it finds if you have selected one.
SYNTAX
CREATE NET GAME Gamename, Playername, Number Of Players
CREATE NET GAME Gamename, Playername, Number Of Players, Flag