> YES! ALL these mutators and mods WORK for the UT Demo. They have been tested over and over, and most are being used on the MAGI server. If there are any errors whatsoever for any mutator(s), email ^MAGI^Chaos

Game Changing Mutators/Mods:

DominateDM: Allows DOM to be played in DM maps. Randomly sets 3 control points at 3 random spawn locations.

CSHP for UTDemo: Stop those hackers in their tracks with this client-side hack protector.

StuffSwapper: Take weapons/items from other mods/mutators and mix em all together. Use this with regular weapons, U4e4UT, and InfiltrationUT to have a triple gun-type server.

No-Item Unreal Tournament (NIUT): "Everyone plays with the same weapon at all times. Weapon changes every X seconds. Weapon is chosen from a configurable list of weapons and this *should* work with any Weapon-derived classes, even non-UT weapons (including the Unreal weapons, although this hasn't been tested yet). Weapons are selected randomly or sequentially. If weapons are selected randomly can optionally force all weapons to be used at least once before restarting the selection process. Replaces all pickup items in the level with ammo for the current weapon. If the current weapon doesn't require ammo, uses health vials. Flags, runes etc. and the translocator aren't affected. Plays a warning sound 3 times just before weapon is changed. To have some weapons used more frequently that others, just put these in WeaponClassStrings more than once. Can optionally have the server increment everyone's health automatically. Can optionally have server give everyone jumpboots, invisibility and/or the damage amplifier at random times and for random durations. Should work with most other mutators, including the Fatboy mutator. Should work with most gametypes (CTF, Domination). Works with bots." - From the README

Weapon Changing Mutators:

Grapple: Replaces the translocator with a grapple hook.

All Weapons: Loads you up ready for fun!

Weapon Arena: Weapon Arena is an arena mutator -- it replaces all weapons with weapons of a single type, and all ammo with the ammo which corresponds to the weapon type. The default weapon is of the same type. However, the Weapon Arena mutator allows you to choose the weapon which will be used in the Arena match. You can choose any of the Unreal Tournament weapons, any of the Unreal 1 weapons, and any third-party weapons.

ca's Sniper Mutator: The following is all about the ca's Snper Mutator. This gets complicated, so stay with me.
Every player starts with the sniper rifle (modified shockrifle)
As players gain score they will be awarded points, which can be used to purchase enhancements
Players gain score for kills, lose score for dying
If you're hit in the head you'll take x3 damage
If you're hit in the leg you'll take 1/2 damage but have a movement penalty
If you're hit in the torso you take normal damage
The amount of damage you have taken will affect your accuracy

Enhancements Overview:
Lasersight - This gives you a tiny red dot with which to aim with. (Cost 0pts)
Zoom - This allows you to zoom (via AltFire). (Cost 2pts)
Fast Shot - This halves the amount of time it takes to fire a shot. (Cost 2pts)
Explosive Shot - This creates a small explosion at the point of impact causing area damage. (Cost 5pts)
Enhanced Damage - This doubles the amount of damage each shot makes. (Cost 10pts)
Ghost Shot - This makes your shots invisible, at the cost of damage capability. (Cost 5pts)
Shield Belt - This will give you a shield belt. (Cost 3pts)
Health - This will give you a medical kit. (Cost 2pts)
Stimpack - This will increase your speed at the cost of some health. (Cost 2pts)

Infiltration Weapons: Fight with weapons such as the Shotgun, M16, Handgun, AT4, Grenade Launcher, Sniper Rifle, etc.

Unreal4Ever Mutator (U4e4UT): Fight with weapons such as the Freezer, the Nuker, Baby Nukem Doll, Hellsaw, Python, M16, Phasor, Railgun, FleshBomb Rifle, Flamer, and Quicksilver.
FOR INFO ON THIS MUTATOR, CLICK HERE!

Unreal4Ever Halloween 99 Weapons: Adds a new weapons called the 'pitchfork' and changes the rocket launcher so Primary Fire is skulls and Secondary Fire is pumpkin heads.

Non-Weapons Changing Mutators:

RuneZ 1.0: Adds several runes to the level which effects attack and defence.

OFFENSIVE:
Strength Rune: While you have this "Rune", you do 2x Damage.
Pestilence Rune: Everything around you takes some damage
DEFENSIVE:
Regen Rune: Your health slowly regenerates up to 150%.
Resist Rune: You take only half damage.
OTHER:
Vampire Rune: Whenever you hit some one, you get 50% of the damage you dealt added to your health.
Barb Rune: Whenever you hit some one who has this rune, you will take 50% of the damage you dealt. Be careful of using a strength rune, damage amplifier, or fully loaded eightball on someone with this rune, as you will instantly kill yourself.

Soul Harvest: Once a person dies, their transparent soul raises toward the sky. Grab it to get a frag.

Bleeder: This mutator cause an injured person to bleed from where he is hit.

Bloodtrails 2: Bloody footprints appear after running over a gibbed corpse.

Chunky Fun!: As you attack/hit the enemy, gore flys off. Combine with MoreGore for a GOREFEST!

MoreGore: When a person dies, there corpse explodes into more gore than the regular.

Pinata: When a character dies, every powerup/weapon is dropped, even ones (s)he isn't using.

AntiLamer: This mutator limits how a player's suicides affects the team's over score, and limits how many times a player can kill their own teammates before they are on the Lamer's List.

Capture the Tree: Instead of a flag in CTF, its a Christmas tree. Also chanegs the view when you press F1.

Fatboy: The more people you kill, the fatter you get; and the more you die, the skinnier you get. Hilarious!

Hunting: A king of the kill type of mutator where one person is 'it' and the object of the game is to be 'it'. You turn a translucent yellow if 'it'.

Health Glow: Displays the amount of health a person has with a glowing aura around that person.

Mutator 6 Pack: WHICH INCLUDES:
.....Vampire: You'll get 50 health for every frag.
.....Night Fight: You'll fight in a very dark arena
.....Instant Respawn: All weapons and pickups will respawn instantly.

Translocam: A mutator which adds a spy camera to the top left of your screen while using the translocator; very useful!

TwinsenEd's Mutator Pack of 3: WHICH INCLUDES:
.....Fluxuating Gravity: gravity changes every few seconds, randomly chosen gravity from the minimum and maximum values.
.....Slipperyness: makes the level slick, normal game slickness is about 9.0, this is default at 0.1.
.....Meat!: bodies give you a specified health, default is 40.

Crotch Shot: Allows for one hit crotch shots.

Kick Idle Players 2: Kick players from servers who are not playing.

ServerAdds: Show a message on a player's screen in online games.