Here is the full list of all 40 Lakeview Cabin Collection achievements.
Defeat the sewer monster
Beat the Minisode "Last Christmas"
Drop the windvane on an enemy
Collect all records
Beat Lakeview Cabin III with everyone alive
See the family portrait
Get three of your friends to "return"
Get the dog to survive till the end
Hack up your friends
Push the bed to the limit
Get a score of 50000 in "Space Psychos"
Drink all the beer you can find
Get rid of the weird smelly stains
Beat Lakeview Cabin VI with everyone alive and 10 NPCs saved.
Save at least 15 crew members
Wear all five masks at the same time
Throw a friend into the woodchipper
Kill 30 zombies in one run
Burn the enemy to crisp.
Finish the game with everyone missing a leg
Beat Lakeview Cabin IV with everyone alive
Save the poor soul
Kill the barn inhabitant
Open all the secret doors in one game
Get to the attic without raising the alarm.
Collect 5 bags of gold
Redemption
Sympathy
Tragedy
Get a score of 50 in "Super Dad"
Beat all four episodes