| name | explanation | gamerscore |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 40 |
| secret achievement | Keep playing to unlock this achievement. | 20 |
| secret achievement | Keep playing to unlock this achievement. | 20 |
| secret achievement | Keep playing to unlock this achievement. | 20 |
| secret achievement | Keep playing to unlock this achievement. | 20 |
| tutorial | Finish the tutorial. | Ten |
| for glory and courage | Receive all Crocker Medals from Admiral Picklepie. | 30 |
| enter croakers | Chat with Agent Crockett in the Autumn Islands. | Ten |
| fish and tips | Get a helpful Fish Tip from the old Anglerwranglest Kerblapp. | Five |
| puffer me down | Win a game of Blowfish with Kerblapp and Othoo. | 15 |
| crushed ice | Hit the enemy ship with the Ice Spire. | 15 |
| penguin fan | Amazing penguins jumping into the water to swim. | Five |
| over the moon | Receive all Royal Moonflowers from Her Majesty Nausicaä. | 20 |
| fish kebab | Harpoon contaminated barnacles from sea creatures. | Five |
| this magical moment | The Magic Shell Shop is open. | Ten |
| Don’t I Know You? | Visit Captain Toot and Goose in the postgame. | Ten |
| Set sail! | Finish the game and sail into the sunset. | 100 |
| baby’s first singamabob | Deliver the Strange Ancient Junk Relic to the Lightkeeper. | Ten |
| Plenty of Whosits and Whatsits | Deliver all pieces of Ancient Junk to the Lightkeeper. | 30 |
| hook, line, stinker | Catch all the fish and complete your collection. | 30 |
| shooting star | Shoot it all for Snapps and complete your collection. | 30 |
| Become addicted to | Fill half of your fish collection. keep it up! | 15 |
| soft-shelled turtle | Fill your photo collection halfway. well done! | 15 |
| gateway slug | Use a small amount of boat parts at Shipshape Shops. | Five |
| I don’t like slugs | Consume an insane amount of boat parts in the shipyard. | Ten |
| But slugs like me | Use a ridiculous amount of boat parts in the Shipshape Shops. | 15 |
| This Is Fine | what’s that smell? something burning | Five |
| Great Ball of Fire | Set enemy ships on fire. | Ten |
| race with yaw face | Win the race against Jimothy and Dexter. | 15 |
| Built for speed | Defeat Deep Six at least once in every world. | 30 |
| Nice Shooting Dads | Complete one of Wesley Dadshooter’s Target Courses. | 15 |
| crack shot | Complete all Wesley Dad Shooter target courses. | 30 |
| light up the night | Complete the first Light Prism event with the Lightkeeper. | 15 |
| lights out | Complete all Lighthouse Prism events. | 30 |
| secret achievement | Keep playing to unlock this achievement. | 30 |
| Operation Clovert | Track illegal traders for Croakers. | 15 |
| Croaker Command’s Most Wanted | Cloakers’ illegal trade ring will be permanently shut down. | 30 |
| sweeter than honey | Put an end to the sticky situation between Marley and Scampy. | 15 |
| wind master | Fully adjust the sail for at least 15 seconds. | 15 |
| boarding party | Successfully board an enemy ship. | Ten |
| Davy Jones | Sink the first enemy ship. | Ten |
| texaby | Capture a Tekk clan tanker. | Ten |