Here is the full list of all 37 Flinthook achievements.
You've beaten Admiral Goldfeathers!
A good score against Admiral Goldfeathers, earns you the Roasted Relic!
You're leveling up! You've claimed the Star Sailor Relic!
You've beaten Bad Billy Bullseye!
A good score against Bad Billy Bullseye, earns you the Twitch Relic!
After many levels, you've won the Quarter Master Relic!
Rising through the levels! The Space Captain Relic is yours!
You've wrecked an enormous amount of ships! It's only natural to get the Shipwrecker Relic!
This great score against Bad Billy Bullseye grants you the Blink Relic!
Making short work of Bad Billy Bullseye, earns you the Silver Bullseye relic!
You've handed Bad Billy Bullseye a speedy defeat! You win the Golden Bullseye Relic!
This great score against Admiral Goldfeathers grants you the Fast Plucker Relic!
Making short work of Admiral Goldfeathers, earns you the Silver Goldfeathers relic!
You've handed Admiral Goldfeathers a speedy defeat! You win the Golden Goldfeathers Relic!
You've beaten Baron Von Guu!
A good score against Baron Von Guu, earns you the Broken Glass Relic!
This great score against Baron Von Guu grants you the Oozed Relic!
Making short work of Baron Von Guu, earns you the Silver Von Guu relic!
You've handed Baron Von Guu a speedy defeat! You win the Golden Von Guu Relic!
You've defeated Gwarlock. But maybe there's a better way?
You've saved Gwarlock! The Lighthouse is lit once more. Peace returns to the cosmos!
A good score against Gwarlock, earns you the Fingersnap Relic!
This great score against Gwarlock grants you the Oh Snap Relic!
Making short work of Gwarlock, earns you the Silver Gwarlock relic!
You've handed Gwarlock a speedy defeat! You win the Golden Gwarlock Relic!
You've defeated every Rex versions of the bounties!
You've collected all the ancient relics!
You've collected all of the galaxy's Lore!
You've collected all the Perks!
You've collected all Black Market Items
This great score during the Infinite Mode grants you the Bronze Infinite Run Relic!
A good score during the Infinite Mode earns you the Silver Infinite Run Relic!
A solid score during the Infinite Mode wins the Golden Infinite Relic!
Arr! You've obtained all of the achievements!
You've beaten Tusky Grimble!
You've beaten Vorace Horace!
You've freed the Dueling Deaths from their curse!