Here is the full list of all 40 Goosebumps: The Game achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Complete the game without ever using the cell phone.
Take pictures of every monster possible using the Haunted Camera.
Have your life ended in 10 unique ways.
Finish the game in # turns or fewer.
Find a way to call RL Stine without touching gross coins or a dirty phone receiver.
Use modern technology to give the second Ghost Child his heart's desire.
Tell Aunt Dahlia about your weekend plans.
Complete the game after draining your phone to 0% battery.
Grab every item you possibly can.
Defeat Slappy while wearing the Haunted Mask.
Discover Slappy's secret shame.
Gather all possible items dropped from the laundry chute.
Be proactive and start your laundry.
Toss 10 expendable items into a deep, dark hole.
Survive the game to completion.
Track down RL Stine in the phone book and give him a call.
Recreate a crime scene to get security off your scent.
Achieve a perfect game of skeeball.
Survive a power outage with gnome complications.
Find entry into the bookstore.
Correctly answer a riddle as if your life depended on it.
Charge your cell phone.
Pry the Haunted Mask off your face.
Access the mysterious dimension from every possible angle.
Find a way inside the Mall.
Convince your brother to give you a ride across town.
Look into an antique mirror and do some self reflection.
Solve a compression problem to reach the attic.
See to the needs of the 3 unexpected guests.
Intimidate a very deadly creature.
Narrowly escape defeat by wearing a talisman into the woods.
Evict an elderly intruder.
Take a photograph using the Haunted Camera.
Disable a deadly toy bent on destruction.
Face what lies beneath the sink... and survive!
Complete Area 1 and return home.
Place the Magician's Top Hat on its rightful owner.
Find a way past the strange man in the woods.
Collect the cell phone from your school locker.