Berserk (Forward x2, Backward x2) - Increased firing rate.If the player's health is at maximum, it turns into shield regeneration until the player loses health. Booster (Backward x4) - Health regeneration.Speed (Forward x4) - Increased movement speed.Once players filled up their Adrenaline gauge, they can perform one of the following 'Adrenaline Combos', by moving in a certain combination at a rapid pace, to gain a temporary advantage: One new main feature for the game is its 'Adrenaline' system, where players can fill up a special numeric gauge (from 0 to 100) by collecting special Adrenaline pickups (shaped like a large pill) and killing opponents. It also features split-screen multiplayer (for up to four players) and character-based stats (where characters of different species get different benefits). Developed in conjunction with the PC version, the Xbox version is one of the flagship titles for the launch of the Xbox Live online service. The game was also released for the Xbox on Septemas Unreal Championship. With Malcolm's team on a hot streak, is this the year he will be dethroned? Over the years, the tournament begins to act like a traditional sport (rather than a glorified underground fighting circuit), with new combatants entering the tournament (including mercenaries, robots, gene-boosted Juggernauts, the Egyptian-themed human Anubans, a collection of sadistic humanoids, and the alien specie Gen Mo' Kai). Set in the year 2302, the game takes place eight years after the events of the original Unreal Tournament (where Malcolm defeats Xan Kriegor in the 4th Liandri Grand Tournament).

The game also features an new single-player campaign, where players draft teammates from a roster of free agents (each with their own unique set of statistics). Along with free bonus packs, the game was later superseded by Unreal Tournament 2004, which added numerous content (including vehicle-based combat). Along with new gameplay mechanics (such as double-jumping and the ability-based 'Adrenaline' system), the game features a new assortment of weapons, levels, characters, and game modes. It is the sequel to the 1999 game Unreal Tournament, bringing the fast-paced arena-based gameplay to Epic's Unreal Engine 2 game engine.

Unreal Tournament 2003 is a multiplayer-focused sci-fi fantasy first-person shooter developed by both Epic Games and Digital Extremes and published by Infogrames for the PC on October 1, 2002.

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