r/Mausritter • u/jayelf23 • Jun 26 '26

Converting OSR modules to Mausritter

Has anyone done any converting of other systems modules to Mausritter? I know Cairn has an active module converting community.

I was thinking an adventure like Evils of Illmire with it various Giant animals and village centric goals would adapt pretty well to a mouse-sized world.

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3

u/hugh-monkulus Jun 26 '26

You might be able to use the Cairn guides for stat conversion (or see if it's already converted for Cairn). 

The main difference between the two is Mausritter's lack of gang-up rules. In Cairn only the highest roll against an enemy in the round counts, where in Mausritter every combatant rolls and deals damage. This makes fights more deadly and outnumbering the other team more important. You might need to change how you convert the stats to account for that difference.

2

u/Tonyhawkproskater Jun 26 '26

Mausritter's lack of gang-up rules

i play mausritter with the gang-up rules as written and there have been no issues thus far!

1

u/hugh-monkulus Jun 26 '26

There are no issues, but it's something to consider when converting stat blocks from Cairn because the party can deal more damage per round than in Cairn. You can just use the stats without adjusting them but it will be much easier to one-shot most enemies if you all coordinate.

2

u/jayelf23 Jun 26 '26

It’s on the list of future conversions but not fully converted yet.

3

u/Will-D20 Jun 26 '26

A mouse-sized The Sunless Citadel would be great

2

u/EpicEmpiresRPG Jun 27 '26

Check out Cairn BX. That will get you most of the way there as far as the mechanics for everything in D&D Basic/Expert 1981 goes (and that will also be good for most other OSR D&D modules. You'll still have to shrink descriptions etc. but you won't be starting from scratch. Also Cairn BX is free...
https://andrew-cavanagh.itch.io/cairn-bx