Here is the full list of all 22 Lust form Beyond Demo achievements.
Look at unconscious Mabel for 3 minutes.
Look at the cultist orgy for 5 minutes.
Pick up the devil mask, when the light is out in the mansion.
Pick up all the masks.
Talk to the prisoner under the stairs.
Collect all the lauv'abrarc figures.
Spend a minute reading prayers from Iauv'abrarc's altar.
Collect all the ritual items.
Open the secret locker in Theodore's bedroom.
Find and use all the sedatives.
Find and use all the first aid kits.
Read all the letters concerning Mabel and complete all the conversations with her.
Pick up all the items in Theodore's room.
Don't show any doubts speaking to the Cult members.
Finish the dream about the land of Lusst'ghaa.
Finish the game.
Walk through Lusst'ghaa without receiving damage.
Open the tabernacle with as few moves as possible.
Read all the notes.
Pick up all the touchable items in the game.
Complete the game in censored mode.
Turn off censorship during gameplay.