Unreal Tournament is a great series, and the game has tons of user created Mods. One such mod was called Damnation and it was quite popular, so popular that Codemasters have decided to release a full game with the same title. according to a report on IGN.com :

Codemasters, a leading video game publisher, and US creative studio Blue Omega Entertainment today announced Damnation, a new videogame franchise set to come leaping onto the Xbox 360 video game and entertainment system from Microsoft, the PLAYSTATION 3 computer entertainment system and Games for Windows this winter.
Evolving the shooter genre with its unique and exhilarating combination of fluid action and combat, Damnation will feature huge, open environments, frenetic combat, daredevil acrobatics and high-octane vehicle-based stunts. Presenting players with an intense test of reflexes, quick thinking and rapid-fire conflict, Damnation will feature vast, breathtaking landscapes, each covering miles of distance and thousands of vertical feet.

you can read the full story here.