Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Rank	Achieve at least an A Rank and unlock the Crow Launcher.
B Rank	Achieve at least a B Rank and unlock the Crow Bar.
Checking in on a friend	Talk to Arthur when he's waiting in the car.
Complete	Complete the Game.
Flamethrower	Find the flamethrower.
Magnum Revolver	Find the magnum revolver.
Med Kit Pro	Upgrade the potency of the med kits.
Quizmaster	Get a score of five or more on the Mermaid Quiz arcade game.
Running Shoes	Find the secret running shoes.
S Rank	Achieve an S Rank and unlock the Crow Wings.
Secret Hunter	Find all 15 hidden secrets.
Secret Map	Find the secrets map.
Shotgun	Find the shotgun.
Thorough	Defeat all four optional mini-bosses.
Wishes Granted	Upgrade all four weapons.