# Project Zomboid 42.5.1 UNSTABLE Hotfix Released

- Product: Project Zomboid (https://whatsnew.fyi/product/project-zomboid)
- Vendor: The Indie Stone
- Date: 2025-03-12
- Original notes: https://store.steampowered.com/news/app/108600/view/502819483050573983
- Permalink: https://whatsnew.fyi/product/project-zomboid/releases/2025-03-12-42.5.1-unstable-hotfix-released

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fix zombie heat map to reduce excessive zombie spawns in some remote locations
- **added** — Add missing tiles for Stendo's Firearms Emporium including the sign
- **changed** — Characters with Smoker trait now cough once every 12-35 hours

- Slight fixes to zombie heat map. Some remote locations had too many. (Zombie heat map is always a work in progress and will be continually refined through many patches)
- Added missing tiles for Stendo's Firearms Emporium, including the all important sign.
- Characters with Smoker will now cough once in 12-35 hours.

[Full 42.5.0 UNSTABLE patchnotes if you missed them.](https://theindiestone.com/forums/index.php?/topic/81787-build-4250-unstable-released/)