Built with YMB — so it survives WARNO updates instead of breaking on them.
You need: Windows and WARNO. Nothing else — Git is not required.
- In Steam: WARNO → Properties → Installed Files → Browse.
- Open
Modsand runCreateNewMod.bat YourModName. - Download Deploy-YSM.bat into that new folder,
next to
CommonDataandGameData. - Double-click it.
The installer fetches YMB and the published YSM configuration package, then asks whether to apply it. It never changes your game unless you answer yes — say no and nothing is touched. You can apply it later at any time:
YMB\YMB.bat sync --mod ysm --yesYMB\YMB.bat recover --mod ysm --yesEvery original file goes back.
⚠️ KeepYMB/.ymb-state. That folder is what makes the undo possible.
| 🎮 Steam Workshop | Features, screenshots, changelog |
| 💬 YSM Community | Questions, bug reports, ideas |
| 🧰 Yuri's WARNO Toolkit | Recover decks lost to a game update |
🔧 Manual install (without the installer)
Create a WARNO mod as above, then extract the full
YMB release into it so that YMB sits
beside CommonData and GameData. From a terminal in the mod folder:
curl -L -o YSM-config.zip https://github.com/Yokaiste/YSM/releases/download/stable/YSM-config.zip
tar -xf YSM-config.zip -C YMB\mods
YMB\YMB.bat validate --mod ysm
YMB\YMB.bat build --mod ysmYSM-config.zip unpacks to YMB\mods\YSM\config — the configuration YMB builds from, plus
this repository's LICENSE and NOTICE. It is not the full source; that lives here.
Review YMB\.ymb-build\output, then install:
YMB\YMB.bat sync --mod ysm --yes🔄 Updating
Double-click Deploy-YSM.bat again. It replaces YMB and the YSM configuration in place, then asks
whether to apply the update. If you answer no, apply it later with:
YMB\YMB.bat sync --mod ysm --yesUpdating replaces YMB\mods\YSM\config outright, so anything you edited there is lost. Work
from a clone of this repository instead if you are making changes.
After a WARNO update, restore the originals before updating the game mod:
YMB\YMB.bat recover --mod ysm --yesCustom non-commercial attribution + source-link license — see LICENSE and NOTICE.
- ✅ Play it, edit it, share it for free
- ✅ Upload it to a workshop or a code host at no charge
- 📣 Credit Yokaiste, link the source, say what you changed, pass the same license on
- ❌ No selling, paywalls, or monetized redistribution without written permission
This list is a summary. The LICENSE is what actually applies.
YSM contains no WARNO game data — it describes changes applied to your own copy of the game, and those files stay subject to Eugen Systems' terms.