[dezzpayne]

Atlus is my favorite publisher/developer. They are not particularly well know in NA but are pretty big in Japan.

They are responsible for the Shin Megami Tensei games. Notable series include:

Digital Devil http://en.wikipedia.org/wiki/Shin_Megami_Tensei:_Digital_Devil_Saga
Persona http://en.wikipedia.org/wiki/Shin_Megami_Tensei:_Persona_3
Etrian Odyssey http://en.wikipedia.org/wiki/Etrian_Odyssey
SMT Strange Journey http://en.wikipedia.org/wiki/Shin_Megami_Tensei:_Strange_Journey
Demon's Souls http://en.wikipedia.org/wiki/Demon's_Souls
3D Dot Heroes http://en.wikipedia.org/wiki/3D_Dot_Game_Heroes
Tactics Ogre series http://en.wikipedia.org/wiki/Tactics_Ogre:_The_Knight_of_Lodis