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