GribbleGrunger
Dreams in Digital
Lots of things these games Demons Souls and Dark Souls did, like leaving the message to other people asynchronously, so you feel connected, but not really connected at the same time, all of these things inspired us when we were designing the system features for PS4.
Like sharing features. I enjoy so much watching people play Dark Souls on YouTube. These games still have a special place in my memory.
From this podcast: http://blog.us.playstation.com/2013/11/21/playstation-blogcast-099-best-of-a-generation/