Speaking to GI at the EA Games Studio Showcase in London last week, Valve’s Doug Lombardi revealed that Portal was offered to Microsoft for inclusion on XBLA, but was knocked back.
“We’d love to do that. Right now it’s something we’d love to do. I’d love to sell Portal on Xbox live,” said Lombardi. “[But] the platform holders aren’t doing that right now. There’s a size limit and all kinds of other things.
“We’ve asked them, we said we were open to it. So it’s a decision for the platform holder and how they want to make the games available and how much bandwidth they want to [allow].”
More through the link.