Full list of all 99 Scream Collector achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 79 achievements, and there is 1 DLC pack containing 20 achievements.
Capture 100 Ghosts
Click on the house 100K times.
Activate the Click Bonus 500 Times Outside
Activate the Scream Bonus 500 Times Outside
Activate the Speed Bonus 500 Times Outside
Spin The Wheel 250 Times
Find 1000 Hidden Objects Outside
Have 500 of Everything Outside
Make 5000 spooky sounds Outside
Explode 500 Flying Bats
Earn 1 Billion Halloween Spirits Outside
Capture a Ghost of Each Color
Smash 250 Pumpkins
Knock on the Door 100 Times
Melt 100 Witches
Feed 100 Trees or Zombies
Play 50 Games of Simple Simon
Buy the Giant Moon
Build all floors of the house
Poke The Giant Eye
Make Lightning Strike The House!
Open the door of the house
Click on the Rug 100K times
Activate the Click Bonus 500 Times In The Entry Hall
Activate the Chill Bonus 500 Times
Activate the Speed Bonus 500 Times In The Entry Hall
Scratch Cards 250 Times
Find 1000 Hidden Objects In The Entry Hall
have 500 of Everything In The Entry Hall
Make 5000 spooky sounds In The Entry Hall
Snuff Out 1000 Candles
Earn 1 Billion Halloween Spirits In The Entry Hall
Clean Up 1000 Spiders & Webs
Change the Fireplace to each color
Smash 250 Skulls
Cast 150 Spells
Use 100 Butler Treats
Catch 50 Rats
Set the Clock 100 Times
Open 250 Doors
Rebuild the Hanging Skeleton 50 Times
Chase the tentacles off the stairs
Kill The Vampire
Feed The Bear Rug
Click on the drain 250K Times
Activate the Click Bonus 1000 Times In The Dungeon
Activate the Dread Bonus 1000 Times In The Dungeon
Activate the Speed Bonus 1000 Times In The Dungeon
Smash Potions 250 Times
Find 1000 Hidden Objects In The Dungeon
Have 600 of Everything In The Dungeon
Make 10K Spooky Sounds In The Dungeon
Earn 1 Trillion Halloween Spirits In The Dungeon
Defeat the Microbes 250 Times
Catch 50 Prisoners
Enlarge 50 Things
Defeat The Chicken 100 Times
Open The Treasure Chest 50 Times
Freeze and Shatter 25 Critters
Harvest 100 Fruit From The Vine
Smash All The Potions In Potion Smash
Tickle the Prisoner To Death
Throw The Green Goo
Grow The Vine To Full Size
Bring The Monster To Life
Burn 250 Critters
Mix a Potion of Each Color
Hit The Target with Green Goo
Activate the Click Bonus 1000 Times In The Bunker
Activate the Prepared Bonus 1000 Times In The Bunker
Activate the Speed Bonus 1000 Times In The Bunker
Scratch Cards 250 Times in the Bunker
Find 1000 Hidden Objects In The Bunker
Have 600 of Everything In The Bunker
Earn 1 Trillion Halloween Spirits In The Bunker
Revel 500 Sections of Dirt
Change the Channel 250 Times in the Bunker
Make 10K Sounds In The Bunker
Click on The Toilet Paper 25K Times
Click on the toilet 300K times
Activate the Click Bonus 1000 Times In The Bathroom
Activate the Creep Bonus 1000 Times In The Bathroom
Activate the Speed Bonus 1000 Times In The Bathroom
Play Pipes 250 Times in the Bunker
Find 1000 Hidden Objects In The Bathroom
Bathroom Progress
Make 10K Sounds In The Bathroom
Empty the TP Roll 250 Times
Earn 2.5 Trillion Halloween Spirits In The Bathroom
Find 250 Bath Toys
Use a Bath Bomb of Each Color
Use 100 Bottles in the Bathroom
Summon Mary 50 Times
Defeat the Toilet 100 Times
Clean 100 Bloody Hands
Hit 25 Skeletons
Whack 250 Sink Squids
Reveal the Piggy 50 Times
Feed the Toilet 50 Times