Hellgate: London, which debuts at No1, is the first of twelve PC games to make the top twenty.
Five PS2 games make the top twenty, including Singstar Swedish hits Schlager at No2 and Pro Evolution Soccer 2008 at No10.
Last week's No1, Metroid Prime 3 Corruption, falls two places to No3, and is one of only two Nintendo platform games to chart this week.
One Xbox 360 game, Naruto: Rise of a Ninja, makes the top twenty at No15:
01. Hellgate: London (PC)
02. Singstar Swedish hits Schlager (PS2)
03. Metroid Prime 3 Corruption (Wii)
04. Football Manager 2008 (PC)
05. The Legend of Zelda: Phantom Hourglass (DS)
06. World of Warcraft (PC)
07. Half-Life 2: The Orange Box (PC)
08. World of Warcraft: The Burning Crusade (PC)
09. Counter-Strike 1: Anthology (PC)
10. Pro Evolution Soccer 2008 (PS2)...