Unreal Tournament 2004, also known as UT2K4 and UT2004, is a futuristic first-person shooter computer game developed by Epic Games and Digital Extremes. It is part of the Unreal series of games, particularly the subseries started by the original Unreal Tournament, and is a sequel/expansion to 2002's Unreal Tournament 2003.
The game features most of the content of its predecessor, replacing it on the shop shelves. Unreal Tournament 2004 boxes sold in the United States include a $10 mail-in rebate requiring that a short form be completed and sent to the publisher along with a copy of the manual cover for Unreal Tournament 2003.
Versions sold in the United Kingdom had a similar offer, but required sending in the play CD for Unreal Tournament 2003 instead.
Among significant changes to gameplay mechanics and visual presentation, one of the major additions introduced by Unreal Tournament 2004 is the inclusion of vehicles and the Onslaught game type, allowing for large-scale battles.
Its sequel, Unreal Tournament 3, was released on 19 November 2007.
There are many vehicles available in Unreal Tournament 2004. Most of them make an appearance in the Onslaught game type, while a few feature in Assault. The full set consist of aircraft types and vehicles. There are also two spacecraft which only officially feature in one Assault map, and different types of gun turrets which players can take control of.
The game includes extensive modification support which allows users to easily create maps, models, gamemodes as well as various other additions to the game. The game features a flexible modification system which seamlessly blends custom content with the original, as well as allowing for easy tweaking of the game with the "mutator" system.
In 2004 Epic games held the "Make Something Unreal" contest, which rewarded the creators of the best submitted modifications with prizes in cash, computer hardware, and, ultimately, a license for commercial use of Unreal Engine 2 and 3. Red Orchestra, a total conversion modification based on the Eastern Front of World War II and focused on realism-oriented gameplay, was the winner of the contest and is currently available as a retail title on Steam.
Alien Swarm was the winner of Phase 4 of the Make Something Unreal Contest for best non-FPS modification. In 2010, the game was released as a standalone game for free, based on the Source engine instead of the Unreal engine.