Here is the full list of all 79 Scream Collector achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Play 50 Games of Simple Simon
Open 250 Doors
Freeze and Shatter 25 Critters
Find 1000 Hidden Objects Outside
Bring The Monster To Life
Find 1000 Hidden Objects In The Entry Hall
Earn 1 Trillion Halloween Spirits In The Dungeon
Open The Treasure Chest 50 Times
Find 1000 Hidden Objects In The Dungeon
Defeat the Microbes 250 Times
Enlarge 50 Things
Catch 50 Prisoners
Have 600 of Everything In The Dungeon
Activate the Dread Bonus 1000 Times In The Dungeon
Activate the Speed Bonus 1000 Times In The Dungeon
Activate the Click Bonus 1000 Times In The Dungeon
Harvest 100 Fruit From The Vine
Make 10K Spooky Sounds In The Dungeon
Grow The Vine To Full Size
Hit The Target with Green Goo
Throw The Green Goo
Smash Potions 250 Times
Defeat The Chicken 100 Times
Tickle the Prisoner To Death
Burn 250 Critters
Smash All The Potions In Potion Smash
Click on the drain 250K Times
Mix a Potion of Each Color
Catch 50 Rats
Rebuild the Hanging Skeleton 50 Times
Cast 150 Spells
Use 100 Butler Treats
Feed The Bear Rug
Change the Fireplace to each color
Clean Up 1000 Spiders & Webs
Earn 1 Billion Halloween Spirits In The Entry Hall
Snuff Out 1000 Candles
Kill The Vampire
Set the Clock 100 Times
have 500 of Everything In The Entry Hall
Scratch Cards 250 Times
Activate the Chill Bonus 500 Times
Activate the Click Bonus 500 Times In The Entry Hall
Activate the Speed Bonus 500 Times In The Entry Hall
Smash 250 Skulls
Chase the tentacles off the stairs
Make 5000 spooky sounds In The Entry Hall
Click on the Rug 100K times
Open the door of the house
Earn 1 Billion Halloween Spirits Outside
Have 500 of Everything Outside
Feed 100 Trees or Zombies
Smash 250 Pumpkins
Make Lightning Strike The House!
Melt 100 Witches
Capture 100 Ghosts
Poke The Giant Eye
Spin The Wheel 250 Times
Capture a Ghost of Each Color
Activate the Click Bonus 500 Times Outside
Activate the Speed Bonus 500 Times Outside
Activate the Scream Bonus 500 Times Outside
Explode 500 Flying Bats
Build all floors of the house
Click on the house 100K times.
Buy the Giant Moon
Make 5000 spooky sounds Outside
Knock on the Door 100 Times
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