CRASH BANDICOOT (1) LEVEL LIST
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First Island
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1. N. Sanity Beach (Clear Gem)
2. Jungle Rollers (Clear Gem)
3. The Great Gate (Clear Gem)
4. Boulders (Clear Gem)
5. Upstream (Clear Gem) 
Boss 1. Papu Papu
6. Rolling Stones (Clear Gem)
7. Hog Wild (Clear Gem)
8. Native Fortress (Clear Gem)

Second Island
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9. Up the Creek (Clear Gem)
Boss 2. Ripper Roo
10. The Lost City (Green Gem)
11. Temple Ruins (Clear Gem)
12. Road to Nowhere (Clear Gem)
13. Boulder Dash (Clear Gem)
Locked 1. Whole Hog (Clear Gem)
14. Sunset Vista (Clear Gem / Key) 
Boss 3. Koala Kong

Third Island
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15. Heavy Machinery (Clear Gem)
16. Cortex Power (Clear Gem)
17. Generator Room (Orange Gem)
18. Toxic Waste (Blue Gem)
Boss 4. Pinstripe Potoroo
19. The High Road (Clear Gem)
20. Slippery Climb (Pink Gem)
21. Lights Out (Purple Gem)
Locked 2. Fumbling in the Dark (Clear Gem)
22. Jaws of Darkness (Clear Gem / Key) 
23. Castle Machinery (Clear Gem)
Boss 5. Dr. Nitrus Brio
24. The Lab (Yellow Gem)
25. The Great Hall
Boss 6. Dr. Neo Cortex

Maximum percentage: 100% (20 Clear Gems, 6 Coloured Gems, 2 Keys)