Here is the full list of all 15 Lust for Darkness VR: M Edition achievements.
Finish the game
Rescue Amanda from the mansion
Defeat Willard Yelverton
Die
Go insane
Enter the world of Lusst'ghaa
Enter the Yelvertons' Mansion
Get captured by the cultists
Listen to the full dialogue about the name "Lusst'ghaa"
Open the chest in Amanda's room
Spend 10 minutes at the cultists' orgy in the Yelvertons' Mansion
Complete the Side Story: Cult of Ecstasy
Complete the Side Story: Arcanes of Lusst'ghaa
Complete the Side Story: Yelvertons' Legacy
Complete all the Side Stories