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13th Age System Reference Document


Archmage Engine LogoThis is the 13th Age System Reference document. It contains all the open content from the 13th Age RPG which we call the Archmage Engine. Whether you are a publisher or a gamer, you can use this under the terms of the Open Gaming License.

This is not the 13th Age Core Book, which is a beautiful, gamer-friendly book packed with extra content and written in the author’s distinctive style.

It is however, an excellent, playable game, and we hope it will tempt you into trying the real thing.

13th Age

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September 6th, 2014
13th Age is the edition of Dungeons & Dragons that I've always wanted. Created by Jonathan Tweet and and Rob Heinsoo, the lead developers of D&D 3E and 4E, this is their "love letter" to D&D. It's an innovative mix of d20-based [...]
June 3rd, 2014
Following the example of many other successful models (which the creators of this game had a hand in as well), The 13th Age SRD is a smart business move and a valuable tool at the game table as well. [...]
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Rule System(s)
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File Size:
3.67 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:
April 23, 2016
This title was added to our catalog on May 14, 2014.