- Twisted Metal
- Gran Turismo
- Warhawk - did not sell well
- MediEvil - did not sell well
- Everybody's Golf - not developed by sony
- Cool Boarders - not developed by sony
- ParappaTheRapper - not developed by sony
- Arc The Lad - not developed by sony
- Legend of Dragoon - only sold 1 million units and did not make its budget back
- Wild Arms - not developed by sony
- Ape Escape - not a big seller
And more. Plus IPs they later acquired like Wipeout. - not a big seller
The PS2 had sequels to some of those games and added additional 1st-party titles like:
- God of War
- Dark Cloud (+ "sequels") - not developed by sony
- Mark of Kri - was a massive failure
- Okage: Shadow King - not developed by sony
- Ico - by a failed team
- Shadow of the Colossus - see above
- Jak and Daxter - naughty dog wasn't owned by sony at the time
- Ratchet and Clank - see jak and daxter
- Sly - didn't sell well
- They even had their own football game, This is Football - didn't sell well
- Siren - didn't sell well, failed team
- The Getaway - didn't sell well, failed team
- Games like SingStar, EyeToy games, Buzz - diminishing sales over time
