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