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