Master code:
Enter SouthEnd as a case-sensitive name for player 4.

All teams and players:
Enter ALL150 as a case-sensitive name for player 4.

All arenas:
Enter MOREROOM as a case-sensitive name for player 4.

Extreme difficulty:
Enter NO FEAR as a case-sensitive name for player 4.

Multidisc:
Enter CONFUSED as a case-sensitive name for player 4.

Get Rid of HUD :
Enter NOHUD as a case-sensitive name for player 4.

Boost Frame Rate :
Enter NOSYNC as a case-sensitive name for player 4.

Thanks to Revolution reader MaGGoT666!