Only some PS1 and PSP games available through the new PlayStation Plus tiers will feature trophies, as developers can choose whether or not to add them.
Sony revealed in a PlayStation Blog post that while some games - including Ape Escape, Hot Shots Golf, IQ Intelligent Qube, and Syphon Filter - will have trophies, their inclusion will be on a game-by-game basis as "this feature is optional for developers".
Trophies were only added as a feature to PlayStation games during the PS3 era, meaning everything from the PS1, PS2, and PSP lacked an external achievement system (unless, like Final Fantasy 7, a game was ported to a more modern console).
Players will therefore be able to play games like Syphon Filter with a new set of objectives for the first time in more than twenty years.
While Sony has only revealed four games with trophies so far, the full list shouldn't be too far away as the new PlayStation Plus tiers launch in North and South America on June 13, followed by Europe, Australia, and New Zealand on June 23.
Trophies aren't the only new feature coming the Classic Games Catalogue though as PS1 games will seemingly have a CRT filter, gameplay rewind button, and more.
Sony is yet to confirm the full list of retro games arriving alongside the new PlayStation Plus tiers but did reveal 29 of them earlier in May. More than 700 games will be available through the service in total, with around 100 confirmed so far.
Ryan Dinsdale is an IGN freelancer who occasionally remembers to tweet @thelastdinsdale. He'll talk about The Witcher all day.