In Silver City on Boldan, there is a teleporter on top of a fountain that does not work, except for at 3 AM; the idea being you have to be an insomniac to work it (Insomniac Studios made the game). Using it gives you access to a large room where you can view and play unused concepts for the game, as well as listen to commentaries.
The second installment in the Ratchet and Clank series.
Outside of the US, the title is simply 'Ratchet & Clank 2.'
While Ratchet says to a biker "Touch him and it's plasma city", he is holding his wrench. He was originally holding a Lancer but the gun was changed to a wrench due to ratings issues.
The Helpdesk voice originally had a British accent.