While we knew Portal 2 on PS3 would feature some degree of Steamworks integration, the Sony and Valve partnership announced at E3 2010 extends far beyond what we initially expected.
Not only does Portal 2 boast cross-platform co-op play between PS3 and PC, those who purchase a copy of the PS3 version can unlock a Steam copy at no additional cost by linking their Steam and PSN accounts on both platforms.
"We made a promise to gamers at E3 that Portal 2 for the PlayStation 3 would be the best console version of the product," said Gabe Newell, co-founder and president of Valve[...]
Continue reading: Valve Confirms Cross Platform Co-Op for PS3 Portal 2, Can Unlock Copies On Steam...