http://blog.us.playstation.com/2011/04/13/valve-reveals-portal-2-for-playstation-3-steam-details/
"Steam makes its appearance on the PS3 as an overlay within Portal 2. Here, the Steam overlay provides access to Steam Friends, displaying their in-game or online status and providing a quick pathway to text chats, player profiles, friend requests, and game invites. Steam Achievements are earned in lockstep with PSN Trophies and are also accessible within the Steam overlay."
"Steam makes its appearance on the PS3 as an overlay within Portal 2. Here, the Steam overlay provides access to Steam Friends, displaying their in-game or online status and providing a quick pathway to text chats, player profiles, friend requests, and game invites. Steam Achievements are earned in lockstep with PSN Trophies and are also accessible within the Steam overlay."
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