Find the secrets map
Talk to Arthur when he's waiting in the car
Find the shotgun
Find the flamethrower
Find the magnum revolver
Find the secret running shoes
Upgrade the potency of the med kits
Get a score of 5 or more on the Mermaid Quiz arcade game
Complete the Game
Upgrade all four weapons
Find all 15 hidden secrets
Defeat all four optional mini-bosses
Achieve at least a B Rank and unlock the Crow Bar
Achieve at least an A Rank and unlock the Crow Launcher
Achieve an S Rank and unlock the Crow Wings
