Slaughter - S = Laughter!
How To Unlock: Use every type of novelty weapon on a zombie.
Tips
Edit
It is not required to kill them, hitting them will suffice. As all other multi-playthrough achievements, there have been reports of it not unlocking when it should. Try to contain the requirements in one playthrough, to be on the safe side. Take note of the following item and ensure you find this while doing the relevant mission
- Funny Painting - "Art Appreciation"
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