First Party is Sony. I've played most of their IPs. Runner up would be Nintendo.
Arc the Lad
Colony Wars
Dark Cloud
Demon's Souls
Dead Nation
Gran Turismo
God of War
Gravity Rush
Heavy Rain
Infamous
Jak and Daxter
Jeanne d'Arc
Killzone
Kingdom of Paradise
The Legend of Dragoon
Legend of Legaia
Little Big Planet
The Mark of Kri
MediEvil
MLB The Show
Parappa the Rapper
Playstation All Stars
Pursuit Force
Ratchet and Clank
Rogue Galaxy
Shadow of the Colossus
Siren
Sports Champions
Syphon Filter
Twisted Metal
Uncharted
Untold Legends
White Knight Chronicles
Wild ARMs
Wipeout
ESPN Extreme Games
Cool Boarders (demo only)
Jumping Flash (demo only)
Modnation Racers( demo only)
Third party is either Taito or Capcom.
I've played all the games on both Capcom Classics and Taito Legends collections plus a lot of the games they've released to consoles.







