A few months back, Valve announced some initial details of Steam’s debut in the PS3 version of Portal 2. While people were excited to hear about the PS3 game’s inclusion of Steam access to Portal 2 on any PC or Mac, they also had a bunch of questions.
Portal 2 for PlayStation 3 is the first title to support Steam on a console. Specifically, that means it offers cross-platform matchmaking, gameplay, friends, chat, and achievements, all powered by Steam. Steam on the PS3 also saves co-op game progress and single player saved games to the Steam Cloud, enabling players to pick up where they left off on any PlayStation 3.
So, here’s a bit more info about Steam on the PS3.