Full list of all 82 Monsters 'til Midnight achievements.
The base game contains 76 achievements, and there are 3 DLC packs containing 6 achievements.
Hold 6 different weapons
Reach level 10
Reach level 15 in the mansion
Survive for 5 minutes with any character
Survive for 10 minutes
Get Revolver to max level
Get Cricket Bat to max level
Find the map
Defeat a total of 1,500 enemies
Reach level 5
Reach level 17 in the tomb
Reach level 20 in the forest
Survive for 6 minutes with Cannonhail
Survive for 7 minutes with Dogface
Survive for 8 minutes with Monobot
Survive for 12 minutes with Count Ghostache
Survive for 15 minutes with Clive Thulu
Survive for 15 minutes with Catterick Larcen
Survive for 15 minutes with Mrs. T
Get Stake Launcher to max level
Get Blunderbuss to max level
Drink 20 cups of tea
Hold 6 different items
Destroy a spawner in the mansion
Destroy a spawner in the tomb
Destroy a spawner in the forest
Defeat the mansion boss
Defeat the tomb boss
Defeat the forest boss
Escape the mansion via the portal
Escape the tomb via the portal
Escaped the forest via the portal
Defeat a total of 10,000 enemies
Complete a total of 25 runs
Survive 20 minutes in mansion
Survive 20 minutes in tomb
Survive 20 minutes in forest
Collect a total of 10,000 gold
Equip 2 evolutions at the same time
Survive the unkillable death clocks for 1 minute
Find the compass
Find the weaponsmith's journal
Fill 25 entries in the collection
Fill 50 entries in the collection
Fill the collection
Find and equip Radial Bullet
Find and equip Explosion
Find and equip Repel Enemies
Find and equip Loot Vacuum
Find and equip Heal Player
Find and equip Freeze Enemies
Find and equip Fire Area
Evolve the Revolver
Evolve the Stake Launcher
Evolve the Cricket Bat
Evolve the Cucumber Sandwiches
Evolve the Holy Hand Grenades
Evolve the Grave Warden
Evolve the Crumpet Cannon
Evolve the Laser Beam
Evolve the Blunderbuss
Evolve the Seeker Missile
Evolve the Shrieking Skull
Evolve the Gear Grinder
Evolve the Scone Mines
Evolve the Stone Heart Shield
Evolve the Flame Thrower
Evolve the Plasma Rifle
Evolve the Tesla sphere
Evolve the Beam Sentry
Evolve all the weapons
Get the Missile Launcher to max level
Get the Eagle Talisman to max level
Retrieve a secret relic from the mansion
Retrieve a secret relic from the tomb
Retrieve a secret relic from the forest
Escape the Cursed Mansion via the portal
Escape the mansion within 18 minutes
Escape the cursed tomb via the portal
Escape the tomb within 18 minutes
Escape the cursed forest via the portal
Escape the forest within 18 minutes