Why nobody says Crash?
'cause he's not a playstation franschise anymore
but seriously, i think the best are
twisted metal (longest)
god of war (favourite)
Okage, Dark Cloud Series, Ape Escape, Rogue Galaxy, The Legend of Dragoon, White Knight Chronicles, and Ratchet and Clank
Gravity Rush, inFamous, and Heavenly Sword.
Burn everything else.
Jak, Sly, and Ratchet can live.
can heavenly sword count as a franchise when its only just one game?