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