| Achievement | How to unlock
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- ...And You Want to Keep It? (20 points)
| - Collect a Cursed Artifact.
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- Aim for the Flat Top! (10 points)
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- Are You A God? (150 points)
| - Complete the game on 'Professional' difficulty.
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- Back Off Man. I'm A Scientist (40 points)
| - Obtain 100% PKE scans for every paranormal creature.
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- But the Kids Love Us! (20 points)
| - The children's reading room has a story to tell, but it will take more than your eyes to see it.
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- Disaster of Biblical Proportions (20 points)
| - Complete the 'Central Park Cemetery' level.
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| - Complete the 'Checking Out the Library' level.
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- Ghost Fever Grips New York (20 points)
| - Complete the 'Museum of (Super)Natural History' level.
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- Ghostbusters Drinking Game (40 points)
| - Quench your thirst wherever possible to avoid being scared spitless.
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| - Purchase all upgrades for the Proton Gun.
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| - The hedge maze is a real eyesore; do some Protonic pruning.
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- I Ain't 'Fraid of No Ghost! (10 points)
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- I Don't Want My Face Burned Off (30 points)
| - Purchase all upgrades for the Meson Collider.
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- I Feel So Funky (5 points)
| - Get slimed by a charging ghost.
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- I Looked at the Trap, Ray! (20 points)
| - Recover 20 of your own full ghost traps.
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- I Love You When You Rough-House! (10 points)
| - The tidy architectural office could use some Proton-based humbling.
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- I'm Picking Up A Signal... (20 points)
| - Obtain a 100% PKE scan on a paranormal creature.
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- I'm a Ghostbuster, Not a Doctor! (20 points)
| - Revive your teammates 20 times.
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- I've Quit Better Jobs Than This. (20 points)
| - Some ghosts had a real blowout in the Coat Room. Clean it up?
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- It's Slime Time (20 points)
| - Use the Slime Tether on 15 ghosts.
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| - Remedy a dubious food choice to make the bar mitzvah as orthodox as it can be.
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- Let Me Guess, Gozer Worshippers (20 points)
| - Complete the 'Lost Island Rising' level.
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- Mother Pus Bucket! (30 points)
| - Purchase all upgrades for the Slime Gun.
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- Nice Shootin', Tex! (40 points)
| - Complete the game with less than $100,000 in property damage.
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- Once S'more into the Breach (20 points)
| - Complete the 'Panic in Times Square' level.
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- One down, on the Ground! (20 points)
| - Airborne coffins are an affront to gravity; use your Proton Pack to avenge Mother Nature!
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| - Slam dunk a ghost into a trap
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| - Trap a ghost using the Slime Tether.
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- Somebody Saw A Cockroach on 12 (20 points)
| - Complete the 'Return to the Sedgewick' level.
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- Spores, Molds, and Fungus (40 points)
| - Collect all Cursed Artifacts.
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| - Trap a ghost using the Stasis Stream.
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- The Destructor (40 points)
| - Complete the game with more than $3,000,000 in property damage.
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- The Flowers Are Still Standing! (20 points)
| - Complete the 'Welcome to the Hotel Sedgewick' level.
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- Total Protonic Reversal (5 points)
| - Knock yourself down with your own weapon.
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- We Came, We Saw... (50 points)
| - Complete the game on 'Casual' or 'Experienced' difficulty.
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- We Have the Talent! (20 points)
| - Complete the Firehouse training level.
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- We Have the Tools! (40 points)
| - Purchase all available equipment upgrades.
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- We be fast! They be slow! (30 points)
| - Purchase all upgrades for the Dark Matter Generator.
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- You Gotta Try This Pole! (5 points)
| - Slide down the fire pole.
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- You Never Studied (10 points)
| - Keep your ears open to learn everything you can about the Civil War.
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