Buy a PC game last week? If you did the chances are it was Burning Crusade, the World of Warcraft add-on that is sitting top of the charts after accounting for nearly 1 in 3 PC game sales last week. The game has become the second fastest PC game in chart history as the WoW juggernaut shows no sign of slowing down. You have to feel a little sorry for upcoming MMOs like Vanguard when faced with this kind of competition. Life is almost too short to play one MMORPG properly, never mind two. Elsewhere in the charts the disappointing Lost Planet - great landscape, average action - falls to number two while the ugly, yet oddly therapeutic, World Snooker Championship 2007 hits the top ten.