If you can play with real people, why settle for robots? That's a sentiment which resonates with much of the gaming community, if industry trends and sales figures are anything to go by. Blizzard's online roleplaying game, World of Warcraft, reached 9 million subscribers in July. Microsoft's Xbox Live online gaming service was a major selling point for the Xbox 360. Most recent big-budget action games support multiplayer functionality. Even some largely single-player titles - such as Neverwinter Nights - enjoy continuing sales long after release due to the astonishing amount of online content available. Are single-player, AI-driven games becoming a thing of the past?