Start the game with the -boom [number of players] command line parameter to initiate a network game. Use one of the following additional command line parameters to activate the corresponding network cheat.
Effect - Command line parameter
Assign a player name - -name [player name]
Capture the flag mode - -capture
Cooperative mode - -cooperative
Disable enemies - -noenemies
Dogfight mode - -dogfight
Faster weapons firing - -cheater
Power-ups respawned - -respawn