Wow! They still haven't announced the official games list (may vary by region?), but here is the announcement...I'm psyched for this trip down memory lane:
https://www.playstation.com/en-us/explore/playstation-classic/
View: https://youtu.be/nl2h8LDq_oI?t=9
https://www.playstation.com/en-us/explore/playstation-classic/