Ghostbusters The Video Game Cheats

I Feel So Funky (5): Get slimed by a charging ghost.
I Looked at the Trap, Ray! (20): Recover 20 of your own full ghost traps.
I Love You When You Rough-House! (10): The tidy arcitectural office could use some Proton-based humbling.
I'm a Ghostbuster, Not a Doctor! (20): Revive your teammates 20 times.
I'm Picking Up A Signal... (20): Obtain a 100% PKE scan on a paranormal creature.
I've Quit Better Jobs Than This. (20): Some ghosts had a real blowout in the Coat Room. Clean it up?
It's a Living (10): Trap over 50 ghosts in your Xbox LIVE Ghostbusting career.
It's Slime Time (20): Use the Slime Tether on 15 ghosts.
Kosher! (10): Remedy a dubious food choice to make the bar mitzvah as orthodox as it can be.
Let Me Guess, Gozer Worshippers (20): Complete the 'Lost Island Rising' level.
Loans Paid Off (10): More than $100,000 earned in Xbox LIVE.
Mother Pus Bucket! (20): Purchase all upgrades for the Slime Gun.
Nice Shootin', Tex! (30): Complete the game with less than $100,000 in property damage.
No Job Too Big (10): Defeat all Most Wanted Ghosts.
On the Payroll (10): Successfully complete one Xbox LIVE campaign.
Once S'more into the Breach (20): Complete the 'Panic in Times Square' level.
One down, on the Ground! (20): Airborne coffins are an affront to gravity; use your Proton Pack to avenge Mother Nature!
Overachiever (15): Get over $2,500,000 in Xbox LIVE, over 30 post-job awards, 50 jobs completed.
Payday! (10): Be the overall top earner in each Xbox LIVE campaign setting.
Slam Dunk! (15): Slam dunk a ghost into a trap.
Slime Dunk! (15): Trap a ghost using the Slime Tether.
Somebody Saw a Cockroach on 12 (20): Complete the 'Return to the Sedgewick' level.
Spores, Molds, and Fungus (40): Collect all Cursed Artifacts.
Stasis Dunk! (15): Trap a ghost using the Stasis Stream.
The Destructor (30): Complete the game with more than $3,000,000 in property damage.
The Flowers are Still Standing! (20): Complete the 'Welcome to the Hotel Sedgewick' level.
Total Protonic Reversal (5): Knock yourself down with your own weapon.
Wanted! (10): Defeat three Most Wanted Ghosts.
We be fast! They be slow! (20): Purchase all upgrades for the Dark Matter Generator.
We Came, We Saw... (50): Complete the game on 'Casual' or 'Experienced' difficulty.
We Have the Talent! (20): Complete the Firehouse training level.
We Have the Tools! (40): Purchase all available equipment upgrades.
You Gotta Try This Pole! (5): Slide down the fire pole.
You Never Studied (10): Keep your ears open to learn everything you can about the Civil War.

NES Ghostbusters Ending Screen
In the Ghostbusters headquarters, one of the monitors on the upstairs desks has the ending screen from the original Ghostbusters game on the NES. The monitor comes complete with all the spelling and punctuation errors.

Fountain Locations
Fountain 1: At the firehouse. You only need to drink from this fountain once (even though you revisit the firehouse many times).
Fountain 2: At soon as you enter the Sedgewick Hotel, the soda machine room to your right.
Fountain 3: After the water drains from the hallway (at the Sedgewick) but before you reach the Sargassi Lounge, check the corner of the elevator lobby for the fountain.
Fountain 4: In the laundromat Zeddemore breaks into at Times Square. It'll be by the cursed artifact, pushing bone - in the back room - so to speak.
Fountain 5: After the cut-scene of Hoss and Stanz and the two office workers in the elevator at Times Square, you will be at the architectural office. The fountain is at the corner of the hall.
Fountain 6: Public Library. The hallway leading to the juvenile reading room will have this water fountain.
Fountain 7: After the Egyptian and Mummification exhibits at the Museum, Venkman will spring out to surprise Hoss and Zeddemore in a maintenance hallway. The fountain is there, right next to the Azatoth Head artifact.
Fountain 8: When revisiting the Sedgewick, you need to turn the power back on at the generator room. The fountain is in the generator room.

Easy Nice Shootin' Tex Achievement/Trophy
This exploit requires both a hard drive and a memory card to perform. This Achievement/Trophy requires you to beat the game with less than $100,000 in damage, no small feat. Have at least one completed game on the hard drive and start a new game using the memory card. Get to the first real mission (not the training one), then save and quit. Now, load up your hard drive save file and go to the final boss fight. Go into the options menu and go to the gameplay option and change the memory setting to the memory card save. Finish off the boss and the Achievement / Trophy is yours.