We're still getting caught up with all the GDC craziness that happened this week, including this revelation from Valve's Gabe Newell.

[Half-Life 2 for Xbox] was the first big retail disappointment we ve had in the history of the company. So that sort of caused us to scratch our heads a little bit. We ve never missed our forecast on any significant product before, so the fact that that product under performed by somewhere between the factor of two to three was really surprising to us. We still haven t figured out what the hell that meant.

Wow! Underperformed by a factor of two to three? That's a pretty big miss, but not surprising considering the already strong FPS line-up on the original Xbox and the time difference between the PC and console releases.

Check the interview for more, including more about Half-Life 2 episodic content and absolutely nothing about Team Fortress 2. No, really. Nothing.

GDC 06: The Valve Interview [Game Informer]

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