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