Here is the full list of all 12 Rocking Pilot achievements.
Defeat Emperor Xartrax.
Defeat Colonels Helga & Olaf
Collect 50% upgrades for your helicopter.
Collect 10 skulls.
Collect 25 crowns.
Collect 30 trophies.
Defeat Admiral Hammerhead.
Collect 3 trophies in any Hard Mission.
Collect 3 skulls in any Survival mission.
Defeat General Zhang.
Collect 5 crowns in any Score Mode mission.
Unlock Score Mode for any mission.