To install -

Extract the "KF-NagomiSou.rom" file to "..\Steam\steamapps\common\killingfloor\maps\" folder.


Description of map: Hello, I am nama-cha, vice-president of Japan Zombie Association. Yeah! This map was called KF-Nursinghome at MOD version. When converting to the retail version, I fixed some bugs, made re-balance and added some shops. Have fun and scatter your brain! Yeah!
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Download courtesy of SunLit Games
http://www.sunlitgames.net