From the review:
"Portal 2 came as a bit of a shock to PlayStation 3 owners; many were expecting a weak 3rd party port , and some were even expecting the game to skip PS3 altogether. Then at E3 2010, Gabe Newell came out with the shock announcement that not only was Portal 2 headed to PS3 directly from developer Valve, but that it would have Steam integration and would be the definitive console version of the game. That’s a pretty big claim, especially considering that Valve had never developed a PlayStation 3 game before. Then again, this is Valve we’re talking about – and Valve know how to make unbelievably brilliant games."