Synopsis from ebgames.com:

Half-Life® 2 for the Xbox® is the entire, award-winning, single player game tuned and optimized by Valve exclusively for Xbox®. Featuring all of the advanced AI, stunning graphics, and physical gameplay of the PC version, Half-Life 2 for Xbox® not only delivers an uncompromised console adaptation of the game, it delivers with enhanced special effects and graphics – creating what IGN calls the “number one Xbox® prospect for the year."