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