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