Here is the full list of all 74 Crash Bandicoot N. Sane Trilogy achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Discover the Secret Exit in Bear Down
Defeat the Komodo Brothers
Fly, then die.
Discover a Death Route
Defeat Ripper Roo
Discover a "?" Bonus Path
Die.
Defeat Papu-Papu
Enter a Bonus Round after collecting 3 Character Tokens
In a single level, spin an enemy into another enemy twice
Earn 10 Relics (gold or better)
Earn 5 Relics
Defeat N. Cortex
Defeat N. Gin
Earn 21 Gems
Discover a Gem Path after earning a Color Gem
Defeat N. Tropy
Discovered the Secret Exit in Road Crash
Defeat Dingodile
Defeat Tiny Tiger
Spin away an Extra Life
Miss a lot of boxes.
Defeat Koala Kong
Defeat Pinstripe Potoroo
Earn the Key in Sunset Vista
Earn the Key in Jaws of Darkness
Die as Crash.
Defeat N. Brio
Earn 13 Gems
Earn 26 Gems
Earn 26 Relics (gold or better)
Defeat 5 enemies with Coco's Spin
Earn 99 Lives
Don't feel guilty about jumping on him.
Just "forget" it. Repeatedly.
Discover the Secret Exit in Air Crash
Discover the Secret Exit in Diggin' It
Unlocked the Secret Exit in Unbearable
Unlocked the Secret Exit in Hangin' Out
Earn 42 Gems
Earn 27 Relics (gold or better)
Defeat 5 enemies with Coco's Double Leg Drop
Have your bazooka ready.
Shoot the Imposter
Shoot 5 of them in a single level.
Discovered the Secret Exit in Dino Might!
Earn the Gems in the bonus levels
Avoid whatever he's flinging at you.
Earn 30 Relics (gold or better)
Defeat 5 enemies with Coco's Savage Hurricane Spin
Seek and destroy
Do hard time
Seek and destroy. Again.
Shoot a background UFO in Future Tense.