Mausritter is a fantasy tabletop role-playing game by Isaac Williams about adventurous mice.

"[2][3] Mausritter was inspired by the Old School Renaissance and features dungeon crawls.

[4] The prototype for Mausritter was published as a digital zine in 2019.

[4][5] In 2021, a Kickstarter campaign raised AU $149,041 to release a new starter box set, including ten interconnected adventures and updated art.

[1][6] In 2024, the Mausritter player community combined game jam entries for dungeon crawl settings from over forty designers into a single, massive dungeon called Tomb of a Thousand Doors: A Mausritter Megadungeon.