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).
Just "forget" it. Repeatedly.
Earn 99 lives.
Earn 10 Relics (gold or better).
Defeat 5 enemies with Coco's Double Leg Drop.
Don't feel guilty about jumping on him.
Earn 5 Relics.
Defeat N. Cortex.
Earn 42 Gems.
Defeat N. Gin.
Die as Crash.
Unlocked the Secret Exit in Diggin' It.
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.
Fly, then die.
Unlocked the Secret Exit in Air Crash.
Defeat the Komodo Brothers.
Discover a Death Route.
Defeat Ripper Roo.
Discover a Gem Path after earning a Color Gem.
Discover a "?" Bonus Path.