They're all available with updated graphics and modern-day support like Remote Play, Share Play, Live Broadcast, Activity Feeds, and even Trophies. And at the time we learned of a couple more that were right around the corner.
One is the rhythm classic PaRappa the Rapper 2 , which was originally released in 2002. During the latest PlayStation Blogcast , Sony confirmed it will be available on Tuesday, December 15, and it will come with all the aforementioned upgrades and bonuses. They didn't confirm a price but the first 8 titles were between $10 and $15, so expect a similar price tag.
We also hear that the original Max Payne might soon be added to the list, though it's not official. Sony has promised that they will release PS2 games on PS4 "on a regular basis," even if it doesn't really make the latest console "backwards compatible" in the strictest sense of the term.