Unreal Tournament Cheats

Cheat mode:
Note: The following codes may only be enabled in single
player mode. Press ~ to display the console, then enter
iamtheone to enable cheat mode. Then, enter one of the
following case-sensitive codes at the console to activate the
corresponding cheat function.

Code
God mode god
All weapons loaded
Flight mode fly
No clipping mode ghost
Disable flight and no clipping walk
Add indicated number of bots addbots
Advance to indicated map open
Broadcast message to others say
Change game speed (default is 1.0) slomo <1.0-10.0>
First person view behindview 0
Full ammunition allammo
Kill all indicated enemy type killall
Kill all opponents killpawns
Spawn indicated item summon
Spawn indicated opponent summon
Stop time playersonly
Toggle invisibility invisible <0 or 1>
Third person view behindview 1
Change zoom; default is 90, sniper zoom is about 22
fov
breath underwater amphibious
Record demo demorec
Play a previously recorded demo playdemo
Note: To use cheats on a local area network, you must first click
on "Create A Multiplayer Game". Select the "Server"
tab. In "Admin Password" type anything (for example,
1234). In the game, press [Tab] and type adminlogin
(in this example, 1234).
You can now use codes while playing against humans. While most
codes work, the following will not: playersonly, killall
and other kill cheats. if you are not the server (the player that
created the game), the following codes also will not work: loaded
and allammo. On some computers it works, on others it will
not.

Item names:
Use one of the following entries with the summon
code.
cannon
eightball
flakcannon
nali
skaarjwarrior
quad shot
warheadlauncher
enforcer
doubleenforcer
minigun2
pulsegun
shockrifle
sniperrifle
ut_biorifle
ut_eightball
ut_flackcannon
chainsaw
rifle
razorjack
gesbiorifle
minigun
flakcannon
dispersionpistol
stinger
automag
asmd
clip
rifleround
flakshellammo
defaultammo
supershockrifle
udamage

Opponent names:
Use one of the following entries with the killall
or summon codes.
warlord
titan
stone titan
squid
slith
skaarj
skaarjwarrior
skaarjscout
skaarjlord
skaarjberserker
skaarjassassin
iceskaarj
skaarjtrooper
skaarjsniper
skaarjofficer
skaarjinfantry
skaarjgunner
queen
pupae
nali
nalipriest
mercenary
mercenaryelite
manta
giantmanta
cavemanta
krall
lesserkrall
krallelite
gasbag
giantgasbag
fly
devilfish
cow
babycow
tentacle

First get in to the type area thing then type summon (whatever you want) good for enforcer.

Use one of the following values with the "killall [opponent name]" or "summon unreali.[opponent name]" codes:

All of the following use the playersonly code
in order to freeze the game. Since you cannot change weapons while
the code is enabled you have to pre-select it. Most of these tricks
also have a certain amount of "backlash" so the god
code is also recommended. Some of these tricks require a lot of
ammunition, so the allammo code should also be used. Once
you are finished setting up the kill, move the console out of
the way so you can see what happens then deactivate the playersonly
code.
Sniper Rifle: Find someone to shoot, line up a head shot and fire.
The target's head will become suspended in mid-air with a cloud
of blood underneath and the body will fall to the ground. Note:
Try to avoid zooming in as the game will occasionally freeze in
the zoomed mode until you deactivate the code.
Rocket Launcher: When you use either primary or secondary fire,
the gun will automatically load up six missiles and fire them.
However, the rockets will stay where you fired them, resulting
in them staying grouped. This allows you to run up to an opponent
and surround them with groups of missiles.
Ripper: Hold [Fire] and run around randomly in an opponent's
general area until he/she/it is surrounded by as many Razors as
desired (usually about 50-60). Re-enter the code and clear the
area as the Razors ricochet about and cut your opponent to ribbons.
Ripper: As above, only more tidy and less random. Face the direction
your opponent is running. Aim the Ripper at the target's feet
and hold [Primary Fire]. Begin to move the mouse very slowly
up in a straight line, creating a "stacking" effect.
Redeemer: Enable the allammo code to get 999 missiles.
Freeze time, then enable the fly code. Start flying around
the level with [Primary Fire] held before reactivating
time stop and consider the scale of the virtual pain your about
to cause. Then start time and watch the fireworks. Note: Inspect
a missile to find something interesting written on it. If you
use this trick on a relatively large scale the game will slow
down a lot, even on the fastest computers.
Strategy: by Droogie

It is extremly hard to beat Xan. But I found this to be a helpful tip to beating him:

Make sure that you have a rocket launcher and lots of ammo for it. Have it so most of your battles are outside the ship. Now when he comes out, have a rocket home onto him and sending him into space. Its best to try to kill him here because he can fly out into space and die.

All of the following use the playersonly code in order to freeze the game. Since you cannot change weapons while the code is enabled you have to pre-select it. Most of these tricks also have a certain amount of "backlash" so the god code is also recommended. Some of these tricks require a lot of ammunition, so the allammo code should also be used. Once you are finished setting up the kill, move the console out of the way so you can see what happens then deactivate the playersonly code.

Sniper Rifle: Find someone to shoot, line up a head shot and fire. The target's head will become suspended in mid-air with a cloud of blood underneath and the body will fall to the ground. Note: Try to avoid zooming in as the game will occasionally freeze in the zoomed mode until you deactivate the code.
Rocket Launcher: When you use either primary or secondary fire, the gun will automatically load up six missiles and fire them. However, the rockets will stay where you fired them, resulting in them staying grouped. This allows you to run up to an opponent and surround them with groups of missiles.
Ripper: Hold [Fire] and run around randomly in an opponent's general area until he/she/it is surrounded by as many Razors as desired (usually about 50-60). Re-enter the code and clear the area as the Razors ricochet about and cut your opponent to ribbons.
Ripper: As above, only more tidy and less random. Face the direction your opponent is running. Aim the Ripper at the target's feet and hold [Primary Fire]. Begin to move the mouse very slowly up in a straight line, creating a "stacking" effect.
Redeemer: Enable the allammo code to get 999 missiles. Freeze time, then enable the fly code. Start flying around the level with [Primary Fire] held before reactivating time stop and consider the scale of the virtual pain your about to cause. Then start time and watch the fireworks. Note: Inspect a missile to find something interesting written on it. If you use this trick on a relatively large scale the game will slow down a lot, even on the fastest computers.

From the drop down console (~) put in iamtheone to enable cheats and type addbots # (Where # is the # of bots to add)