Mausritter

Take up the sword and don the whiskers of a brave mouse adventurer in Mausritter, the rules-light fantasy adventure role-playing game.

It’s a huge and dangerous world out there, and it does not look kindly on a small mouse. But if you are very brave and very clever and just a bit lucky, you might survive. And if you survive long enough, you might even become a hero amongst mice.

(from official website)