Ratchet & Clank Cheats

Bolt Crank
These Bolts sticking out of the ground are called Bolt Cranks, and they are used to open doorways.
Thankfully, Ratchet's OmniWrench8000 is compatible with the Bolt Crank and you only need to press the [Square] button to attach the Wrench to the Bolt and then move the left analog stick in a counter-clockwise position until the doors open.

Viola !