De engine van Unreal Tournament 2004 is zeer veelzijdig en modmakers kunnen dan ook alle kanten op. Naast de standaard anti-terrorisme mods verschijnen er vandaag de dag allerlei originele modificaties, zoals Unreal Open, een echte tennis mod voor UT2004. Veel valt er niet over de mod te zeggen, want het is gewoon tennis en daar is niets mis mee. Meer informatie over Unreal Open vind je op deze pagina, waar je tevens het 17MB grote bestand kunt downloaden.Weapons

# Weapons Primary fire when holding the ball allows you to serve.

# The longer you hold the button (charge), the faster you shoot the ball. Too much charging overloads your weapon and shoots the ball away in a random location. So be carefull!

# While charging the ball you can give the ball a curve to the left or right. Do this by pressing your Next/Previous weapon buttons.

# Secondary fire when holding the ball instandly shoots the ball away. This mode is recommended for new players.

# Primary fire when not holding the ball allows you to hit the ball. Make sure you are near the ball and then press the fire button to shoot the ball in the direction you are facing.

# Secondary fire when not holding the ball allows you to smash the ball. Holding the fire button charges the power at wich you smash. While charging you cannot dodge and run, however, you can jump higher.