Sierra On-Line and Valve Software have have cancelled the much-anticipated Mac version of its action game, Half-Life.

Valve Software's founder and managing director, Gabe Newell, said the decision was taken to preserve cross-platform communication. “Mac owners would not have been able to play against PC owners,” he said. “As a result of this, there was a great deal of controversy within the Macintosh community.”

He added: "We've spent a bunch of money on the Mac product, and have spent a lot of time thinking about what we need to do to make sure Macintosh users are happy with it when it ships. Which is why we are cancelling the Macintosh version of Half-Life."

He went on to explain that, to Mac-port the game, Mac customers would get “a second-class product”.