| Achievement | How to unlock
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| - Get an A ranking on a single level.
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| - Complete both Wavering Hills Asylum levels.
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- All Your Ecto are Belong to Us
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| - Get 1 character to level 10.
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- Back off Man, I'm a Scientist
| - Fully upgrade all 4 characters.
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- Bustin' Makes me Feel Good
| - Fully upgrade a single character.
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| - Get the 10X bonus on the trapping mini-game.
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| - Get 1 character to level 20.
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| - Complete the Aldridge Manor level.
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| |
| - Earn A rankings on all levels.
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| - Complete both 13th St. Station levels.
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| - Complete both St. Lou's Cemetery levels.
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- Listen... do you smell something?
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| |
- No, You Can't Self-Synergize
| - Get 25 Co-Op assists in a single level.
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| - Complete both Queen Charlotte levels.
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| - Complete a single remix level.
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| - Purchase a single upgrade for any character.
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- Some Kind of Glowing Hubcap?
| - Collect all of Rowans ghostly devices.
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| - Get 1 character to level 5.
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| - Get all 4 characters to level 20.
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- You Must Have a Big Couch
| - Complete a single level with 4 players.
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