You gave a tentacle ten tickles

Achieve an S Rank and unlock the Crow Wings

Achieve at least a B Rank and unlock the Crow Bar

Find all 15 hidden secrets

Defeat all four optional mini-bosses

Upgrade the potency of the med kits

Find the magnum revolver

Find the secrets map

Talk to Arthur when he's waiting in the car

You filled the gas can up ALL the way

Return to the Auto Shop after scanning five Anomalies or resources

Reach 88mph

After making contact with Oppy, plan your first route into the Zone from her Auto Shop