Here is the full list of all 25 Crash Bandicoot 2: Cortex Strikes Back trophies - there are 7 bronze, 11 silver, 6 gold and 1 platinum.
Collect all the Crash Bandicoot 2: Cortex Strikes Back trophies.
Earn 27 Relics (gold or better).
Earn 10 Relics (gold or better).
Earn 5 Relics.
Just "forget" it. Repeatedly.
Defeat 5 enemies with Coco's Double Leg Drop.
Defeat N. Cortex.
Earn 42 Gems.
Unlocked the Secret Exit in Diggin' It.
Defeat N. Gin.
Earn 99 lives.
Die as Crash.
Unlocked the Secret Exit in Hangin' Out.
Unlocked the Secret Exit in Unbearable.
Defeat Tiny Tiger.
Earn 21 Gems.
Unlocked the Secret Exit in Bear Down.
Defeat the Komodo Brothers.
Fly, then die.
Discover a Death Route.
Unlocked the Secret Exit in Air Crash.
Don't feel guilty about jumping on him.
Defeat Ripper Roo.
Discover a Gem Path after earning a Color Gem.
Discover a "?" Bonus Path.