Here is the full list of all 21 Trouble In The Manor achievements.
Play the piano
Kill 5 Vampires
Become a Vampire
Kill 15 Bloodhounds as a Murderer
Kill 40 Innocents as a Murderer
Get DNA off of 50 bodies
Find over 300 items
Win over 50 rounds as an innocent
Win over 25 rounds as a murderer
Flame over 50 players
Survive a round with 100% health
Kill over 25 players using poison traps
Link a victim to a murderer with DNA
Steal the souls of 100 victims
Stab over 150 players to death
See what the dead say using a seance device
Kill over 400 players in total
Play the Manor's secret chime
Die over 100 times
Kill over 250 players with a gun
Kill your first player