Excluding any Square Enix developed or published games, it is still leaves the question of platform. As a general list.

Suikoden II
Dark Souls
Persona 4
Tales of the Abyss
Ar Tonelico 2

By platform

PSone

Suikoden II
Suikoden
Vagrant Story
Lunar
Lunar 2

PS2
Persona 4
Tales of the Abyss
Ar Tonelico 2
Xenosaga III
Odin Sphere

PS3
Dark Souls
Valkyria Chronicles
Demon Souls
Atelier Meruru
Tales of Graces f

I can get in some pretty lengthy reasons why, but I'll leave that to another post if necessary.