Valve Software founder Gabe Newell made waves in the game space recently when he called Windows 8 “a catastrophe for everyone in the PC space.” Rob Pardo, executive vice president at Blizzard Software, has chimed in with some agreement. He posted this message to Twitter on Wednesday:

nice interview with Gabe Newell – “I think Windows 8 is a catastrophe for everyone in the PC space* – not awesome for Blizzard either

Newell is concerned that Microsoft is moving to a closed platform with Windows 8. The company plans to integrate a Windows Store that will enable people to buy software directly from Microsoft, with Microsoft retaining a 30 percent cut of the sale — similar to Apple’s approach with the iOS and Mac App Stores.

Pardo’s comments are his own and not necessarily reflective of a corporate position from the makers of StarCraft II, World of Warcraft and Diablo 3. But they would seem to indicate growing discontent from some leading game developers about the future direction of Windows.