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