Advanced Search

Game Unfolding MachineClick to magnify

Game Unfolding Machine


Game Unfolding Machine (GUM) is a generic and modular Game Master’s assistant that helps you set up and play your favorite tabletop roleplaying games with less effort by providing you with ideas for creating and playing your game.

It is essentially made of two parts, a game creation guide that helps you set up engaging plot seeds and open up to world building elements, and a second part with a set of inspiring random tables to enrich your game further, or get ideas on the fly, such as items, enemies, battle strategies, clues, and more.

This supplement has been created for Solo or GM-Less playstyle. GUM can be a perfect addition for your solo games, which will help you setup richer games and give you plenty of ideas for whenever you get stuck.

Discord Server to chat about my tools


  • Game creator - World truths, campaign goals, plot hooks
  • Scene design - Get ideas for exploration and combat scenes
  • Plot discoveries - Figure out what your PCs can discover next
  • Generators like for creatures or locations - Prompts for coming up with stuff
  • Motivations and deeds for Good or Evil character backgrounds
Languages: English, Spanish

Tools to play digitally:

Difference between PUM, GUM, and SUM?

PUM is a GM emulator, SUM is a supplement for any GM emulators, and GUM v2 is a set of abstract random tables and generators. You can use all three together, or however you prefer with other systems.

Difference between GUM v1 and GUM v2?

GUM v1 is a bulky all-in-one GM emulator that went a bit over the board. It tried to do everything and encompasses everything I ever played around with in my homebrews. GUM v2 is a concrete content generator that works better along PUM and SUM and has a better defined purpose, representing my current vision for it.

This video explains these differences much better.

Have fun and happy gaming


 Customers Who Bought this Title also Purchased
Reviews (1)
Discussions (1)
Customer avatar
Todd S August 17, 2023 1:51 pm UTC
Does this contain PUM and SUM?
Customer avatar
Saif Addin E August 17, 2023 4:13 pm UTC
Hi Todd. No, PUM and SUM remain to be separate solo systems. They are one-pagers, and reduced in scope. GUM is more comprehensive, and has 20 pages of random tables for you to use, which include ways to generate plots, NPC responses, or plot discoveries. The principles of all three are, however, similar in foundation, and some concepts are common across all three games. GUM v2 is yet a condensed version of v1. I hope this helps. Best regards!
Narrow Results
$ to $
 Follow Your Favorites!
NotificationsSign in to get custom notifications of new products!
 Recent History

Product Information
Silver seller
File Size:
44.9 MB
Original electronic Click for more information
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

For PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.

For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
These ebooks were created from the original electronic layout files, and therefore are fully text searchable. Also, their file size tends to be smaller than scanned image books. Most newer books are in the original electronic format. Both download and print editions of such books should be high quality.
File Last Updated:
December 22, 2023
This title was added to our catalog on August 16, 2023.
Publisher Average Rating