Disgaea D2, Demon's Souls, Drag-on Dragoon 3.

Aegis of earth protonovus assault

LittleBigPlanet 2

The Last of Us
Uncharted

GTA IV

Ninja Gaiden Sigma 1 and 2

Yeah, 2 had censored gore, but the other extra stuff made up for it. And now, the Steam version of Sigma 2 has mods to get the best of everything. I don't know why the Black remake decided to back slide and cut content.

Also, Resident Evil 5 and Devil May Cry 4.

Sonic Unleashed
Burnout Paradise
Uncharted 3
Megaman 9

Most of these are available on current systems (except Unleashed unless you have a xbox), so they're still worth a shot!

Flower

Red Dead Redemption

Booting up PS3 itself is challenging and fun.

- forbidden siren new translation
- drakengard 3
- demons souls og