Crystal Island, featured in Croc: Legend of the Gobbos, is the fifth and final (or secret) island of the game. This island is only unlocked once the player obtains all eight Jigsaw Pieces from the previous eight secret levels by finding all six Gobbos from all normal levels. These levels are unique to other levels in the game, as no Gobbos or Jigsaw Pieces are found; the only objective is to complete the levels. When the player has completed all five levels and defeated the final Guardian, The Secret Sentinel, the game will be 100% completed.
|5-1||And so the Adventure Returns||Normal Level||LLDLURRLLLRULUR|
|5-2||Diet Brrrrr||Normal Level||UDRUULRLLDULDDL|
|5-3||Trial on the Nile||Normal Level||RRRLURLDLLRUULR|
|5-4||Crox Interactive||Normal Level||DDDDULDURRUURUU|
|5-B||Secret Sentinel||Guardian Level||LLLLDRRLLDRDLUR|
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- The island's first four levels are themed after the four islands, with And So The Adventure Returns mimicking the Forest Island, Diet Brrrrr in a similar style to the Ice Island, Trial On The Nile themed like the Desert Island, and Crox Interactive like the Castle Island.
- The code for the final boss is the same code as the code for Riot Brrrrr. If you type it in then you will be put on Riot Brrrrr but you have all levels unlocked.