I destroyed Portal 2. It's a shame because I was really looking forward to that Steam intergration, and now it's pretty useless to me. I'll still link it up in hope that future titles take advantage of the service and I can still get some Steam achievements but boo all the same.
I've been revisiting my PS3 favs all this month too. Played through all of MGS4 with the cutscenes, continued to replay Uncharted 2 (on 70+ single player hours now), beat Dead Space 2 on hard core, played the Castlevania DLC. Gonna go through Modern Warfare, infamous 2, and Dead Space again soon.