Here is the full list of all 12 The Eternal Cylinder achievements.
Get the trunk mutation from within a Roondaslock.
Scare away a Tripobosh or Onogrosh with a smelly surprise.
Process over 100 units of mineral ingredients.
Process over 100 units of organic ingredients.
Frighten a Tonglegroplet using the Deimatic Trunk.
Scare off an Omnogrom by spraying water into its eye.
Make an Onkifurt leave its nest by spraying water into its mouth.
Disable 3 Witnesses.
Scan all creatures using the Analytical Eyes.
Destroy an Exonerator using Mixer Body projectiles.
Defeat a Liberator using Mixer Body projectiles.
Transform to all the mutations that exist in the game.