Here is the full list of all 12 Into The Gloom achievements.
Find all the main menu unlockable notes.
Achieve the ultimate goal.
Experience the existence as a lesser life form.
Become a homeless.
Disappear forever...
Arrive to the red plane.
Fail to achieve the ultimate goal.
Visit your home again.
Free the knife dude from the prison yard.
Meet the box of salvation.
Embrace the agony for the rest of eternity.
Escape the lonely underground maze.