No missable achievements (plus 10 unknown)
Sign in with Steam or Xbox to track your progress, and:
Free the robot.
Complete the prison towers.
Complete castle town.
Complete the throne room.
Complete The Girl and the Robot.
Complete the maze.
Find and shoot Gnat-Man.
Clear the shape puzzle in the prison towers with brute force.
Examine all the paintings.
Find the secret toy room in the maze.