As rumoured last week, have let slip at GDC that the content delivery platform will be unleashed upon the next month.

Word has it that Steam will usher in 2, Team Fortress 2, Counter-Strike, Portal, and the series for Apple's platform in April.

The developer have also let slip that will be released on the Mac and simultaneously this winter.

"Checking in code produces a PC build and Mac build at the same time, automatically, so the two platforms are perfectly in lock-step," offers Josh Weier, 2 Project Lead.

"We're always playing a native version on the Mac right alongside the PC. This makes it very easy for us and for anyone using Source to do game for the Mac."

By Luke Guttridge