Why is Halo 2 one of only three nominees for Game of the Decade? Good call giving it to WoW, can't really argue with that. And GTA III was pretty monumental. But Halo 2? I could understand Halo 1, easily. But what was so special about Halo 2? Most people I know consider it to be the bastard child of the series, and there are countless other games that could be worthy contenders for a nomination: Battlefield 1942, Half-Life 2, Prince of Persia: Sands of Time, Warcraft III, Guitar Hero, Diablo II, Portal...