UT4UU stands for Unreal Tournament 4 Unofficial Update
UT4UU is a game plugin that adds a handful of features to UT4
If for nothing else, one main benefit of installing UT4 is that the game will load much quicker on startup. UT4 load time is significantly slowed down as you download more and more paks. UT4UU helps prevent this and keeps the game load time quick regardless of the amount of paks you have.
The latest release is "" - UT4UU-v10_1_6.zip
Installation instructions included inside of the zip file.