Portal 2, which is a huge disappointment for a segment of gamers.
When asked if there will be any PS3 keyboard/mouse support for Portal 2 by PS Blog, Portal 2's project lead Joshua Weier replied, "No, unfortunately we don't do that. The whole game is built around playtesting, which extends to the hardware and how people use it." He went on to explain: "We have people internally who played on the PS3 - we use it all the time - and we constantly iterated it."
Are you disappointed there's no keyboard and mouse support for the PS3 version? Let us know.