"Speed demon" - Beat 2:10 in the hoverbike race.
"No shocking developments" - Ride the grind rail without getting hit.
"Midtown Insanity" - Go grinding without getting hit.
"Safety deposit" - Rescue all tourists at the bank.
"Dukes up" - Kill the mech with only melee attacks.
"Old skool" - Kill all enemies with only the weapons from Ratchet and Clank 1.
"Destroy all breakables" - Bust up the Circular City.
"Operate heavy machinery" - Destroy 10 robots with the crane.
"Be a moon child" - Mine all moonstones.
"That's impossible!" - Beat the impossible challenge.
"How fast was that?" - Beat 2:27 in the hoverbike race.
"Wrench Ninja II: Massacre" - Kill all enemies with only the wrench.
"Bye bye birdies" - Kill 12 birds.
"Planet buster" - Destroy the large floating globe.
"Prehistoric rampage" - Shoot 4 pterodactyls (Flying Creatures) on planet Oozla
"Smash and grab" - Destroy all breakables inside the Megacorp Store
"You can break a Snow Dan" - Kill the Snow Dan behind the first garage.
"Moving violation" - Destroy 14 ships.
"Heal your chi" - Get all crystals.
"Nothing to see here" - Destroy all Megacorp rockets during the tour.
"You're my hero" - Prevent any tourists from being killed during the tour.
"Try to sleep" - turn 12 raccoons into sheep
 Other Skill Points
"Nano to the max!" - Max out Ratchet's nanotech.
"Weapon envy" - Get all weapons and upgrades.
"Nice ride" - Upgrade all parts of Ratchet's ship.
Big Head Ratchet - 5 Skill Points
Ratchet in a Tux - 7 Skill Points
Big Head Clank - 10 Skill Points
Levels Are Mirrored - 12 Skill Points
Actors have Big Heads - 15 Skill Points
Ratchet in Clown Costume - 20 Skill Points
Big Head Enemies - 25 Skill Points
Beach Costume - 30 Skill Points
Snow Costume - Beat Impossible Challenge