Cut audio clips found in the files of the game included extra quotes which implied a mission at the planet Sharr where Ratchet has to rescue Hydro-Girl and other content.
The last game of the series to be rated T by the ESRB.
The game started off as a racing game until Insomniac realized that Naughty Dog was working on Jak X. Vehicles from that version are reused for the final game.
Merc and Green originally had legs but they were changed to float due to errors in the game's engine.
Ace Hardlight's boss battle would have had him throw a flash-bang grenade and use a shield but the programmers thought he would be too hard.