Here is the full list of all 18 The Sexy Brutale achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
You discovered the mansion grounds. A beautiful, terrible sight.
You discovered the library. What secrets does it hide?
You saved Greyson and Redd. The locks of the mansion open for you.
You have encountered a chilling figure in the heart of the mansion.
You saved Tequila Belle. Glass shatters at your word.
You saved Willow Blue. You can see things that should remain unseen.
You saved Trinity and Clay. The quietest of sounds are clear to you.
You saved Reginald Sixpence. The mansion clocks are yours to command.
You saw everything the Bloody Girl has to show you. Time to get to work.
You collected every card available within the mansion. Someone will be very pleased…
You possess every invite sent to every guest. It is a full — if macabre — collection.
You smashed a priceless chandelier with your voice. Vandalism!
You saved Aurum and Thanos. The secrets of the mansion are yours to learn.
You encountered the deep Lord of the mansion. A prisoner in his own bloodied tears.
You have survived the burning mansion. For some reason, it feels hotter than ever.
You spilled the deepest secrets at the heart of the Sexy Brutale.
The pieces are in place. But the picture is still not complete…
You have unlocked the door to a deep, dark place. Some things never die.