March Fourth for GM’s Day! Today’s the day to tell your GM how much you appreciate all that they do. And if you’re the GM, today’s a great day to treat yourself to a little something to help “fill the well.” DriveThruRPG is having a huge sale on a ton of PDFs and ebooks to help you run a better roleplaying game. What follows are some of my favorite game master resources that are currently free or discounted.

Enhancing Your Game or GMing Yourself

The second edition of the Mythic Game Master Emulator by Tana Pigeon has been the standout RPG purchase of 2026 for me, and with the PDF costing less than $10 for GM’s Day, it’s an incredible value. Not only does it offer a robust and intuitive system for solo roleplay (allowing you to game master for yourself), but the many random tables it contains can help a GM improvise on the fly or provide inspiration while prepping a session or campaign. (If this is appealing to you, you might also be interested in The Adventure Crafter or The Location Crafter, also by Pigeon and also on sale.) The second edition of Mythic GME feels like a huge quality of life improvement over the first and revised editions, with lots of examples and guidance to get started quickly.

And while it’s not part of the sale on DTRPG, the Mythic GME Digital app for desktop and mobile are amazing companions to speed up your solo play. I’ve been using them extensively to power my solo RPG blog since treating myself for Christmas.