Here is the full list of all 32 Beyond a Steel Sky achievements.
Witness both Songbird's endings
Destroy everything that Joey created
Discover all five movie posters
Confront the Council in the Citadel
Open the main gates to allow Wendell to leave with the kids
Set everyone's Qdos level to infinity
Orana can free the children
Free Foster
Got caught spying
Watch a full poetry recital
Earn a party invite
Read the secret message
Unlock Foster's classic coat
Complete LINCspace
Enter the secret room behind the fire
Neutralise Jimmy
Porpoisefully fail Jimmy's scary moment
Obtain a waiver from Orana
Clean everything up, ready for the party
Transfer all the holo-trinkets to your brooch
Liberate Joey from the Museum of New History
Learn the full story of Joey the Saviour
Set the Kids' Exhibit to speak 'Aggressively'
Turn the sprinklers on
Knock Chipworth over
Complete the Alonso interview
Examine all of Graham's conspiracy posters
Enter the main gates
Feed Voxel a stolen sandwich
Complete all tutorials
Complete the game
Complete the game without using any hints