Full list of all 33 Sixty Four achievements.
The base game contains 32 achievements, and there is 1 DLC pack containing 1 achievements.
Get a Hell Gem within the first 64 minutes from the start
Get stuck in the beginning
Click a cookie
Finish the game without deleting anything for 5 minutes and having less than 15 Containment Silos
Play for 64 hours
Have 9 Hell Vaults
Reach a depth of 6400m within 6 minutes of placing a fresh Excavation channel
Have 9 Excavating Channels
Explode the Inverse Chasm
Get 64 000 000 000 stones
Stare into the abyss 64 times
Dig down 64 km deep
Teleport 64 times
Get some Void
Get some Reality
Get 64 000 000 stones
Get a Hollow Stone
Honk 64 times for no reason
Get some Celestial Foam
Destroy 64 machines
Put two silos together
Dig down 6400 meters deep
Find a Chromalit
Click a cube 6400 times
Find a Hell gem
Build 64 machines
Dig down 640 meters deep
Get 64 000 stones
Get Beta-Pylene
Get Qanetite
Dig down 64 meters deep
Get some Elmerine
Complete the game without ever upgrading extraction channels