Tomb of a Thousand Doors: A Mausritter Megadungeon

Created by Matthew Morris

A collaborative effort by the Mausritter Third-party Community; Tomb of a Thousand Doors is a complete campaign setting for Mausritter.

Latest Updates from Our Project:

Surveys Sent!
3 months ago – Thu, Apr 11, 2024 at 07:03:22 AM

This post is for backers only. Please visit and log in to read.

BackerKit surveys are coming!
3 months ago – Wed, Apr 10, 2024 at 03:02:02 PM


Soon, you’ll receive an email from us with a special link to your BackerKit survey. It’s essential to respond to your survey as quickly as possible since we need this information to fulfill your rewards.

You do not need to create a BackerKit account to fill out your survey. When you receive the survey invite email, click the survey link to respond. Answer the questions about your reward preferences, provide shipping information, and purchase add-on items if you like. You don’t have access to this survey link yet, but it will be available soon via email!

After you respond to your survey, you can go back later and change your responses at any time before we close the surveys and get our final counts.

Due to the volatility of shipping prices globally right now, shipping fees for this project will be calculated at a later date once we have the best estimates for everyone. We plan to enter & charge backers for shipping a month or two before fulfillment when we have better estimates of what it will cost to ship backers rewards. We will alert backers when shipping costs are finalized & before we charge your cards in your BackerKit survey. We will keep you informed all along the way!

If you need to review your information or pledge status, you can return to your survey by clicking the link in your survey email or requesting your survey link under "Lost your survey?" on our BackerKit project page at

If you used your Facebook credentials to log in to your crowdfunding account, the BackerKit survey is sent to the email address associated with your Facebook account. If you have another email address that you prefer to use, please contact support at

After surveys are sent, if you did not receive the email, and you Signed in with Apple ID, your email address might be a private relay email address. We can help locate your survey and update your email address, please message us or post a comment with your Backer ID or Pledge # found on your confirmation. You can learn more about your email hiding for your Apple ID here.

Matthew Morris, ManaDawn Tabletop Games

Tony Vasinda, Plus One Exp


4 months ago – Tue, Apr 09, 2024 at 01:12:48 PM

This post is for backers only. Please visit and log in to read.

Just a Quick Progress and BackerKit Update...
4 months ago – Sun, Mar 24, 2024 at 04:59:28 PM

March Update

Thank you all so much for your patience. We have nearly completed the pledge management page and pre-sales store on Backerkit. It took a little longer as we were waiting for funds to be released from Kickstarter and then we are waiting for the invoices with Backerkit (for paid promo) to clear and then we can launch the Backerkit page. We believe it will go LIVE later this week, so stay tuned! I will post here again soon!

Folks who missed the KS campaign will be able to purchase almost all the content from the KS in the pre-sale store!

Update on Development

  • Fernando Salvaterra is doing all (40+) maps and is nearly 75% done and let me tell you, THEY ARE FREAKING RAD!!!
  • We are 80% done with layout
  • 95% done with edits
  • We are nearly wrapped with our Blister Critters crossover
  • The Intro Adventure is DONE!!!
  • Digital Companion Tools are nearly complete
  • Dungeon Synth is done too!

We are cruising along and will easily hit the June deadline for digital release. Once we release the digital we will also open a comments page to help us fine tune and clean up anything we missed!

As a bonus, here are some screenshots of the WIP layout... 

Please reach out to [email protected] with any questions. And again, thanks for your patience! 

More Mausritter to check out...

The fine at Bog Folk Cafe released an AMAZING Mausritter Zine recently, yall need to check this out!

Also, Lazy Cat Cult just released this KILLER Cyberpunk themed Mausritter supplement, MAUSPUNK! It rocks!

A small update and Promo of COOL Games!
5 months ago – Wed, Feb 21, 2024 at 04:44:17 PM


Hey all! Happy February and happy Zine Month 2024! We are still beyond excited about the success of our project! We are so thankful! It is due to this joy and desire to keep putting the BEST product forward that we haven't launched our BackerKit yet.

We have been receiving emails from retailers and folks who missed out on the KS campaign and we have let them know the BackerKit is coming soon. To all of our backers here, we also wanted to let you know that pledge management will begin shortly. We are currently getting all the details lined up and we are curating a bunch of Mausritter third-party product to go in the BackerKit store as additional add-ons! Stay tuned in the weeks ahead!

Want a preview of some of the spreads?

Of course you do!


We have teamed up with the amazing folks bringing you Blister Critters! This amazing game is currently funding on Kickstarter, please go show them some love! - theyhave 14 days left!

Blister Critters by Anthony Grasso, co-developed by Wythe Marschall, is an innovative and surreal TTRPG in which players take on the role of small animals (Critters) in a radiation-blasted, eco-apocalyptic, human-free Saturday-morning cartoon! 

Blister Critters uses a fast, animal-focused version of the Grit System that powers the sci-fi game Stillfleet, including rules for finding and hacking all of the Stuff (capital S) that humanity let behind. 

The book comes with 66 animals, tons of mutations, rules for GMing a cartoon show, and more. You can also pick up a the Blister Critters Boxed Set, which includes 48 cards featuring Beasts (dangerous, bigger-than-Critter mutant animals) and Bliffs (animated Stuff), stickers, dice, the Tons-o-Stuff Mega-Poster, and the Book of Ad-Libs. 

Help us bring a very fun and timely game to life! Stretch goals fund more useful and beautifully designed components in every boxed set. Just look at Tony’s amazing art!

Remember I said we teamed up...

That is right. Myself, Tony, and Wythe put our brains together to bring both Tomb of a Thousand Doors and Blister Critters a crossover adventure that will be published in both campaigns, with stats for each game. We will post more about this soon, but for now please go back this cool project!

Who doesn't want another box set!

More MAUSRITTER CONTENT to support!!!

A Deck of Dungeons and Treasures is a print-at-home digital zine collection featuring a deck-based dungeon generation system aimed for solo role-playing with Mausritter. 

Get your zines and more info by clicking the link below:

Antonio Buch - author of A Deck of Dungeons & Treasures is also an editor and contributor to Tomb of a Thousand Doors. Please go support this amazing supplement!

Tiny Fables is a sandbox-style adventure for Mausritter set in an old-growth forest warped by fae magic. Echoing the themes of classic folklore and fairy-tales, this module confronts players with the narrow distinction between warmth and darkness, cruelty and whimsy, and danger versus reward.

Those who answer the call to adventure will need to overcome impossible odds by relying on their cleverness, courage, and most trusted allies. Will they become the heroes of their own fables? Or will they prove themselves fools in a cautionary tale? The difference between the two fates is razor thin. Regardless of the outcome, it's sure to make for a great story.

Back it here:

Josiah Moore - author and illustrator of Tiny Fables is an artist and contributor in Tomb of a Thousand Doors - so please share the Mausritter love! Only 7 days left!