People assumed that the pitiful amount of releases for PS1 and PSP classics announced over a month or so ago were just a preview of the final list, but those assumptions were dead wrong.
They weren't wrong though, the service was released with a few more games than was announced.
The games
originally announced to the service:
Ape Escape | PS1
Hot Shots Golf | PS1
I.Q. Intelligent Qube | PS1
Jumping Flash! | PS1
Syphon Filter | PS1
Super Stardust Portable | PSP
Mr. Driller | PS1
Tekken 2 | PS1
Worms World Party | PS1
Worms Armageddon | PS1
On top of those the service launched with:
Resident Evil: Director’s Cut |PS1
Wild Arms | PS1
Toy Story 2 | PS1
Echochrome | PSP
Oddworld: Abe's Odyssey | PS1
So, it was announced with 10 games and was released with 15... A 50% increase is not bad, at all.
And yes, they said each tier of the service will refresh monthly, which includes the classics.