Also Assassin's Creed Brotherhood and Revelations are not possible to get the platinum trophy on the PS3, and I don't know if it is possible on Assassin's Creed 3 but I don't think so

Added them to the list. I checked PSNProfiles for Assassin's Creed III, and yeah the online servers were shut down unfortunately.

Also GTA 5 is unobtainable, the servers were shut down in 2021