Unreal Tournament
There are two editions of Unreal Tournament out there, a normal one and the GOTY edition.
To install you'd need the corresponding .run file for your version. I.e. ut-install-436-GOTY.run for the game of the year edition.
To administrate .umod files for UT you'll want to install umodpack (available in aptitude), and there are versions upwards of 436 available as patches.
GOTY came with most of the levels compressed so you may find the game will not run after installation until they are decompressed, using the following script for example.
#!/bin/sh
# decompress all maps
for FILENAME in /usr/local/games/ut/Maps/*.unr.uz
do
ucc decompress $FILENAME
done
# put maps into proper location
mkdir -p ~/.loki/ut/Maps/
mv ~/.loki/ut/System/*.unr ~/.loki/ut/Maps/
like many other games, UT uses an overlay filesystem arrangement for finding files, allowing users to override centrally installed files and settings in ~/.loki/ut/, rather than /usr/local/games/ut/
Even if you are the only (important 
) user on the system, storing base install customisations in your home directory has the advantage of keeping them separate from the rest of the system, as well as preserving them with backups of your home directory.
xumod from umodpack will happily manage the ut directory in your homedir instead of the base one if you first cp /usr/local/games/ut/System/Core.u ~/.loki/ut/System/Core.u; because xumod checks for its presence.