3. Half-Life 2 (2004)

The sequel to one of the finest first person shooters a PC gamer could get their hands on, Half-Life 2 may have lacked multiplayer action, but Gordon Freeman was back in a great single player campaign that was visually amazing and packed a great storyline. It's fair to say that Valve did a more than a decent job of bringing some of the Half-Life PC experience to the original Xbox.