Use the codes below when the game is paused, unless otherwise noted:

To activate the console, you need a Dreamcast Mouse, and Keyboard. If you meet these standards, then do the following: Press the T key once, then hold the ESC key, then press any letter on the Keyboard. Now type in a cheat below:

In the Dreamcast menu select Music, then play any track 4 or above and it will be music tracks from the game!

Unlike the Offline commands (see the code about Ghost mode, God mode, etc.) these commands actually work online and will give you a huge advantage. As usual, press 'T', 'ESC', and then quickly press the 'SPACE' key; this will bring up the command bar. Here you may type commands, and here are a list of great commands that many do not know about.

SetAutoAim 1: Auto Aim for mouse.
SetAutoLock 1: A controller exclusive feature which locks onto your opponent and rarely misses him/her.
Set Input {letter here} {Command here}: Set a command to activate (say I put God mode on the 'A' key, I press the 'A' key and the God mode command is activated).
Feigndeath: Lay down and 'look dead' (This does not always work, but it's a good way to trick people).
Open {Number here}: Sends you to a white box room or freezes.
Open 128.121.19.232:(Server Address here)?Char=20: Spectator Mode.
Open Door: Will show you a cool picture if you do it a few times.
Set input a say|say|say|say|: Floods the screen allowing you to say more than one sentence in the touch of a button. (If you do the say|say|say| enough it will mess up and create FPS drop, this is known as the lag command)
Set input a extra0: Auto Lock command that works with mouse.
Ppp: Instant Freeze.
Showall: Funny, just try it.
fov{Number here}: It makes the graphics glitch or draw.
Suicide: Commit Suicide(NOTE: If you use this in a TDM it will lower your teams' score!)
Throwweapon: Throw away your weapon.
Open 128.121.19.232:{Server Address here}?Char=10: Will let you change servers as a player instead of a spectator.

These all work online and most give you mad advantages(Auto Lock andd extra0) or are just cool to use(Showall, Spectator Codes!).

To enter in the cheat codes (in 1 player games), press tab, and enter in the following codes for the desired effect. You can repeat the process to disable the cheat.

You can summon objects in the game. For example, you might want a redeemer to splatter your enemies. All you have to do is enter the summon code for the redeemer and it'll flop in front of you (note that most of the objects require you be on the ground have have plenty of space in front of you and also note to summon when playing on a server, as with all other codes you have to be logged in as an admin!).

First of all bring up the console or quick console and type 'Summon Unreali.X' where 'X' is the thing you want to summon.

These are just a few of the more useful things you can summon. If you have several monsters and unnamed bots you can remove them all by typing killpawns in the consle or quick console.