Here is the full list of all 12 The Eternal Cylinder achievements.
Disable 3 Witnesses.
Get the trunk mutation from within a Roondaslock.
Scare off an Omnogrom by spraying water into its eye.
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.
Make an Onkifurt leave its nest by spraying water into its mouth.
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.