This guide was originally posted by Stevivor on the original Ghostbuster's game Back Off Man. I'm A Scientist achievement.
Full credit on this goes to Hawk199 on xbox360achievements.org, except for this pearl of wisdom: You can load up the checkpoint, scan the ghost, and then quit without needing to go to another checkpoint. You'll still have the ghost in your guide!
* The Sub-Chapters aren't the only ones where u can scan the ghost within the chapter but the best place to scan them
* The Ghost scan are in 'encounter' Order and some ghost are repeated.
* Important note - Must have Spirit Guide Update to get a confirm scan
* A ghost will still show up in your spirit guide even if you don't have a 100% scan. Basically if you are missing a ghost, check the info page about it. If there is anything listed as "unknown" then you have not done a complete scan. Once the Tobin's Spirit Guide entry is entirely filled out, you have 100% scanned that entity.
* Only ghost that was any kind of trouble was the "Kitchen Flier". Basically run around willy nilly with your PKE Meter and take scans of pots/pans.
Chapter 1 - Sedgewick Hotel 6/6
1. Slimer (Class V Full Roaming Vapor) - "Roudriguez Bar Mitzvah"
2. Bellhop Ghost (Class III Animating Specter) - "Bad Service"
3. Dead Fish Flier (Class I Inhabiting Swarmer) - "Air in Line" *The only place to get Scan* (Description: Flying Dead Fish)
4. Pappy Sargassi (Class III Roaming Animator) - "Sargassi's by the Sea
5. Candelabrum Crawler (Class II Vermin Imprinter) - "Charge of the Light Brigade" *Only Place*
6. Kitchen Golem (Class VI Bi-Dimensional Attractor)- "And the Kitchen Sink, Too" *Only Place*
Chapter 2 - Times Square 6/6 - Can't Miss
1. Marshmellow Mini (Class V Manifesting Outworlder) - "Mass Panic"
2. Hobo Ghost (Class V Free Roaming Vapor) - "Mass Panic"
3. Stone Gargoyle (Class VI Kinetic Animator) - "Ghost & Gargoyles"
4. Construction Worker Ghost (Class III Animating Specter) - "Ghost & Gargoyles"
5. Opera Diva Ghost (Class IV Full Roaming Phantom) - "Hindenburg: The Musical"
6. Stay Puft (Class VII Outsider Avatar) - "Shadow of the Stay Puff"
Chapter 3 - Public Library 10/10
1. Cruster (Class V Telekinetic Animator) - "Dangerous Books" or "Sorted Out"
2. Book Golem (Class VI Bi-Dimensional Attractor) - "Dangerous Books"
3. Librarian Ghost (Class IV Semi-Anchored Entity) - "Ssshhed Again" or "The Gozerian Codex"
4. Paper Construct (Class VI Transformed Composite) - "Slippery"
5. Book Bat (Class I Inhabiting Swarmer) - "Sorted Out"
6. Crusto (Class V Telekinetic Animator) - "Sorted Out"
7. Book Centurion (Class VI Armored Composite) - "Special Collections"
8. Coal Golem (Class VI Bi-Dimensional Attractor) - "The Trouble with Golems" *Only Place*
9. Cultist (Class III Elevated Remnant) - "Hall of Mirrors"
10. Azetlor the Destroyer (Class VI Elevated Remnant) - "Warth of the Collector" *Only Place*
Chapter 4 - History Museum 11/11
1. Possessed Human (Class III Possessor Host) - "Dr. Rutherford,I Presume?"
2. Possessor Ghost (Class VII Wandering Possessor) - Dr. Rutherford,I Presume?" *Only Place!!!*
3. Beauty Queen Ghost (Class IV Wandering Possessor) - "Opening Night"
4. The Chairman (Class VII Ectoplasmic Entity) - "Chairman Chase" or "Board of Trustees" or "It's the Chairman" -- "Chairman Chase" might not count?
5. Possessed Statue (Class III Possessor Host) - "Chairman Chase" or "Unexpected Guests"
6. Flying Skull (Class I Osteo-Focused Swarmer) - "Ruined Hallway" or "Little Egypt"
7. Union Ghost (Class IV Full-Torsoed Floator) Blue Uni - "Ghost War"
8. Confederate Ghost (Class IV Full-Torsoed Specter)Gery Uni - "Ghost War"
9. Venom Crawler (Class VI Vermin Dominant) - "It's the Chairman" *Only Place*
10. Black Slime Fiend (Class V Black Slime Fiend) - "It's the Chairman" *Only Place*
11. Black Slime Ghost (Class V Black Slime Floater) - "It's the Chairman" *Only Place*
Chapter 5 - Return to Hotel Sedgewick 6/6 - Can't Miss
1. Webbed Fiend (Class V Webbed Fiend) - "Enter the Spiderwitch"
2. Cook Ghost (Class III Animating Specter) - "Power Restored" *Only Place*
3. Chef DeForrest (Class IV Armored Phantom) - "Power Restored" *Only Place*
4. Kitchen Flier (Class I Inhibiting Swarmer) - "Power Restored" *Only Place* (Description: Flying pots , Chef sents to attack you)
5. Spider Crawler (Class IV Vermin Entity) - "Ghostworld Again" *Only Place i think*
6. Spiderwitch (Class VI Elevated Remant) - "Lair of the Spiderwitch" *Only Place*
Chapter 6 - Lost Island 6/6
4/6 Ghost have been scan even before you start this chapter
* Black Slime Fiend (Class V Black Slime Fiend)
* Black Slime Ghost (Class V Black Slime Floater)
* Stone Gargoyle (Class VI Kinetic Animator)
* Venom Crawler (Class VI Vermin Dominant)
5. Black Slime Monster (Class VI Slime Shambler) - "Black Slim What?"
6. Imprisoned Juvenile Slor (Class VII Ectoplasmic Outsider) - "Black Slime Beast" *Only Place*
Chapter 7 - Central Park Cemetery 10/10
3/10 Ghost have been scan even before you start this chapter
* Flying Skull (Class I Osteo-Focused Swarmer) - Purple and Green is the same
* Cultist (Class III Elevated Remnant)
* Forgotten this one
4. Cemetery Clawer (Class II Vermin Mimic) - "The Elusive Key"
5. Grave Fiend (Class VI Reanimator) - "The Elusive Key"
6. Cultist Summoner (Class III Mortal Remnant) (A Fat version of Cultist) - "Battle in the Bone Yard"
7. Grave Monster (Class VI Focused Reanimator) - "Crypt Alley"
8. Stone Angel (Class V Minor Kinetic Animator) - "Attack of the Stone Angels"
9. Keyhead Monster (Class VI Semi Merged Attractor) - "Head Stone"
10. Shandor the Architect (Class VII Transformed Mortal Remnant) - "Destrutor Form" *Only Place* The fire form can't scan
Others to Complete the "I'm Picking Up A Signal..."
(All can be found just easily because it is at every chapter)
(Total 54/54 including above)
* Black Slime (Class I Caustic Seep)
* Black Slime Portal (Class I Transdimensional Conduit)
* Ectoplasm (Class I Supernatural Secretion)
* Ectoplasmic Residue (Class I Supernatural Secretion)