Full list of all 51 Crash Bandicoot 4: It's About Time achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Beat a level in N. Verted mode
Defeat N. Brio
Scare the cat hiding from a party
Shut N. Brio up
Meet 'Akano
Complete any Timeline
Defeat N. Gin and his Weapon of Mass Percussion
Find the hidden Green Gem
Spend some time surfin' the waves
Earn any Flashback Relic
Acquire a Flashback Tape
Complete a level as Coco
Shut N. Gin up
Try on a Skin
Earn any Time Trial Relic
Find the hidden Red Gem
Meet Lani-Loli
Crouch or slide into a double jump
Earn any N.Sanely Perfect Relic
Beat a story level without dying
Complete a Bonus Path
Beat any boss in N. Verted mode
Complete ALL levels in N. Verted mode
Complete all Timelines
Play a game of Checkpoint Race
Play a game of Crate Combo
Defeat Dr. Neo Cortex… again.
Defeat Dr. Neo Cortex
Defeat the Doctors N. Tropy
Watch the 100% bonus ending
Watch the 106% bonus ending
Find the hidden Blue Gem
Earn half of the Clear Gems
Earn ALL of the Clear Gems
Earn ALL N. Verted Gems
Find the hidden Yellow Gem
Meet Ika-Ika
Meet Kupuna-Wa
Complete a level with Pass N. Play enabled
Betrayed! By your worst enemy.
Earn ALL of the platinum Flashback Relics
Earn ALL N.Sanely Perfect Relics
Earn ALL of the platinum Time Trial Relics
Pull off a Triple Spin
Defeat an enemy with Triple Spin
Find the source of the Bumpa Berries
Aim and fire!
Do some target practice
Make music in an unlikely place
Grabbed a bushel of Bumpa
Make some noise!