We've reserved this category for games that are primarily played online, which means there are a lot of contenders. Ultimately, though, there can be only one.
Publisher: Blizzard
Developer: Blizzard
Platform: PC
We're not sure what's more impressive: the fact that Blizzard managed to create such a stable, smart and addictive MMORPG in their first try, or the fact that they managed to do so in the face of so much competition. Either way, World of Warcraft is a riveting game, the best massively-multiplayer game of the year and, quite possibly, ever.