Complete the following tasks to unlock achievements and their alloted gamerscore.
| Unlockable | |
| Eleven Calypso Pieces (150) | Find the hidden Calypso piece on each level to unlock the story of Davy Jones and Calypso. |
| Seven Letters (25) | Collect all seven Letters, lost throughout the Prison Fortress. |
| Seven Periwigs (25) | Collect the seven Periwigs hidden around Port Royal. |
| Seven Nautilus Shells (25) | Collect the seven Nautilus shells, scattered throughout the Flying Dutchman. |
| Seven Pirate Flags (25) | Collect the seven Pirate Flags of Tortuga, hidden in chests and secret areas. |
| Seven Paprika Tins (25) | Collect the seven Paprika tins of Isla Cruces. |
| Seven Bottles of Rum (25) | Collect the seven bottles of Rum (hidden in the Black Pearl) during the Kraken's attack |
| Seven Sea Charts (25) | Collect the seven Sea Charts from the streets of Singapore. |
| Seven Skulls (25) | Collect the seven Skulls hidden throughout Davy Jones' Locker. |
| Seven Tarot Cards (25) | Collect the seven Tarot cards lost around the Flying Dutchman. |
| Seven Gold Bars (25) | Collect the seven gold bars of Shipwreck City |
| Seven Pirate's Dice (25) | Collect the seven Pirate's dice, lost around the Flying Dutchman and the Black Pearl. |
| Prison Fortress Treasure (25) | Open the Jackanism chest in the Prison Fortress, and unlock bonus material in the Treasure Trove. |
| Port Royal Treasure (25) | Open the Jackanism chest in Port Royal, and unlock bonus material in the Treasure Trove. |
| Tortuga Treasure (25) | Open the Jackanism chest of Tortuga, and unlock bonus material in the Treasure Trove. |
