Here is the full list of all 50 Last Will achievements.
Complete the isolated study.
Complete the third episode with over 30 minutes to spare.
Complete a full run of episode 3 within the time limit.
Complete a full run of episode 2 within the time limit.
Complete the second episode with over 30 minutes to spare.
Complete the first episode with over 30 minutes to spare.
Complete a full run of episode 1 within the time limit.
Complete the dining hall.
Complete the guest wing.
Complete the game room.
Complete the passageway.
Complete a full run of the Chaos Gauntlet within the time limit.
Complete the Chaos Gauntlet with over 30 minutes to spare.
Reject the will and your inheritance.
Unlock a hundred doors.
Deliberately take out the entire mansion, and whatever may be lost with it.
Completed all four episodes within the time limit.
Complete a full run of episode 4 within the time limit.
Complete the fourth episode with over 30 minutes to spare.
Witness another player complete the transfer.
Complete the transfer chamber.
Become the professor of the Gladsbury Estate.
Complete the laboratory.
Open 50 doors.
Complete the south garret.
Complete the observatory.
Complete the gallery.
Complete the chapel.
Complete the wine cellar.
Complete the workshop.
Complete the greenhouse.
Complete the pantry.
Complete the conservatory.
Complete the master bedroom.
Complete the bunker room.
Complete the darkroom.
Complete the archives.
Complete the storage cellars.
Complete the old tower.
Ensure no drawer, panel or door is left open in a successful multiplayer game.
Complete the chess room.
Complete the office.
Complete the library.
Complete the study parlor.
Listen to your first audio recording.
Open your first door in the mansion.
Complete the entrance hall.
Watch the prologue.
Enter the mansion with a full team of four players.
Complete any act with a full team in under 40 minutes.