Moo-rderer is an achievement in Hearts of Stone expansion and is achieved by killing 20 cows.
- You must use a steel sword to kill them. Any other method (like using signs) won't count.
- An easy location is Martin Feuille's Farmstead, which usually has about 10 cows at once. Kill them, meditate several hours, then kill again.
- Do not attempt this in White Orchard unless you're high enough level to deal with the Bovine Defense Force Initiative.
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