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