Looking for PS3 recommendations.
These are totally worth playing. I'm not going to write a description for each, but if you have any questions about a specific game then I can give you a brief overview.
3D Dot Game Heroes
Afrika
Aquanaut's Holiday
Atelier Rorona: The Alchemist of Arland
Atelier Totori: The Adventurer of Arland
Atelier Meruru: The Apprentice of Arland
Atelier Ayesha: The Alchemist of Dusk
Atelier Escha & Logy: Alchemists of the Dusk Sky
Atelier Shallie: Alchemists of the Dusk Sea
Beyond: Two Souls
Bladestorm: The Hundred Years' War (also available on PS4/PC)
Catherine
The Darkness
Demon's Souls
Folklore
Heavenly Sword
Heavy Rain
inFamous
inFamous 2
Killzone 2
Killzone 3
The Last of Us (also available on PS4)
Metal Gear Solid 4: Guns of the Patriots
Metal Gear Solid: Peace Walker HD Edition
Ni no Kuni: Wrath of the White Witch
Persona 4 Arena
Persona 4 Arena Ultimax
Ratchet & Clank: Future Tools of Destruction
Ratchet & Clank Future: A Crack in Time
Resistance: Fall of Man
Resistance 2
Resistance 3
Resonance of Fate
Rocksmith (also available on 360/XB1/PS4/PC)
Uncharted: Drake's Fortune
Uncharted 2: Among Thieves
Uncharted 3: Drake's Deception
Virtua Fighter 5
Warhawk
I believe MAG has been shut down, otherwise it is also great. There also plenty of awesome smaller downloadable games.