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