Full list of all 54 PEAK achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 32 achievements, and there are 3 DLC packs containing 22 achievements.
Climb past the MESA.
Catch a Flying Disc from 100m away.
Climb past the MESA without ever having more than 10% Heat.
Have a lot of cactuses stuck to you.
Achieve flight.
Offer The Kiln a worthy sacrifice.
Give in to your hunger.
Shoot across the MESA canyon in a Scout Cannon.
Survive an Antlion attack.
Look a little too closely at the blazing sun.
Climb past the ALPINE without ever having more than 20% Cold.
Climb past the ROOTS.
Climb past the ROOTS without ever having more than 25% spores.
Escape a spider's web and survive.
Cure yourself from a zombie bite.
Try all 5 types of Shroomberry in a single expedition.
Pull an unconscious friend 30m with the Rescue Claw.
Block 100 total damage with Fortified Milk.
Eat 3 Hot Dogs in 5 seconds or less.
Ressurect a friend using unholy means.
Bounce up 40m off a mushroom.
Cook and eat a Mandrake.