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