A downloadable roleplaying game

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Aetherological Crystalpunk RPG

MEGALOS is a game for telling stories about adventures in the clouds, fighting evil empires, and dueling ancient gods. The Worlds of MEGALOS are vast and old, each a cosmic emanation connected to one another by the Wellspring- the source of all aether in the cosmos. Make your own World of MEGALOS or play in one of ours, from the Oradam Rift to Pallid Telkane to Zone Gachette to The Erefane. Soar through the air in an airship, dogfight imperials, and wield aetheric magicks as a punk-rock witch.

This tabletop game is inspired by things like classic JRPGs, electronica music, and medieval alchemy. MEGALOS is the first of my games to use the SLIPSTREAM game engine, which uses pools of d20s as the core of its task resolution mechanic.

Crystalpunk Fantasy. Challenging Tactical Combat. Built for Adventure. Welcome to MEGALOS.

The Psythe

The Psythe calling for MEGALOS, one of 9 core Callings.

MEGALOS serves a platform to support multiple different settings and genres in a layered multiverse built onto a shared framework of aetherological science.

The MEGALOS Core book features all the rules you need to play in any World of MEGALOS, or to create your own. It comes packaged with the first MEGALOS Worldbook, The Oradam Rift, a world of floating islands drifting amidst the vasty emptiness of a chasm cleft from north to south pole in a planet called Gaaln. The Oradam Rift is a place of magick and magitek, of imperial crusades and desperate revolutions. Adventure awaits, from the Unshrouded Lands below to the Ebon Moon above.

The game was successfully funded with almost 140% of its original goal. The game has been in development for almost 6 years at this point, going through a dozen iterations and total system redesigns. But finally, it has becoming a reality.

Current Version: v1.1

The game is NO LONGER in Early Access & is fully released!

  • A new edition, v1.1 has just been released as of July 2023. This edition corrects some things, clarifies others, and adds in a bit of errata. Please see the v1.1 Announcement Post for more information or see the downloadable errata sheet.
  • There's a FREE plaintext version of the Core Rulebook. This file does not include the Oradam Rift Worldbook, and is meant for reference, easy reading, or as a demo to decide if you want to buy the book or not (199 pages, includes all character options & rules, but no setting info).

Follow me on Twitter for more regular MEGALOS updates, @Gahostan.


Buy Now$24.99 USD or more

In order to download this roleplaying game you must purchase it at or above the minimum price of $24.99 USD. You will get access to the following files:

MEGALOS Core Rulebook - v1.1 Spreads.pdf 52 MB
MEGALOS Core Rulebook - v1.1 Pages.pdf 42 MB

Download demo

MEGALOS — Bonus Class - The Arcanist.pdf 1 MB
MEGALOS - Plaintext Final v1.1.pdf 1 MB
Blank Character Sheets.zip 1 MB
Quick Play Character Sheets.zip 14 MB

Development log

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Hey there, is there any discord for this system? I kinda wanna talk about it with other folks.

Just opened one up, actually. This link should remain active for up to 30 days. Hope to see you there. :)



With permission of the author, I’ve made a multi-purpose tool to help online play: https://megalos.astralfrontier.org/

It includes a GM initiative tracker, character builder, dice roller, outfit & weapon builder. The tool is and will remain free to use forever.


Checked it out and it is SUPER helpful! Thank you for your work

(3 edits) (+2)

First of all: I'm obsessed! I loved the Crystal punk concept, especially the way witches are described (I'm just obsessed with witches), and I really want to play this RPG with my friends! Second: I have a question. I saw that a free version of the raw RPG material ( thanks so much for that <3 ) was made available, will the character sheet also be available at some point in the free version?

Kisses from Brazil <3


I'm sorry it took me a month to get back to you!!

Yes, I hadn't even realized the character sheets were locked behind the full purchase. They have been set to "Demo" so you can download them along with the free text-only version of the game.


Congrats on the full release!!! Can't wait to run it for my friends!

Are there plans on doing a single-page version going forward? or is spreads the way things'll be going forward?

Pages will be making their return in the final release. The docs have gotten so unwieldy that there's a 2ish hour period of "pdf optimizing" I have to do because I messed something up in the layout. So far I've only had time to put out one optimized pdf per update.

Current plan is a 0.95 early access pass coming next, then the final version is launched off of that. Final version will be both pages and spreads.

Good to know, thanks!

A bestiary will come with the worldbook right? I want to run this cause it looks neat but thats the only thing holding me back

That's correct! The bestiaries are bound to the worldbooks so that monsters appropriate for each setting are packaged along with that setting. :] Worldbook coming v soon.

Ah alright. I'll have to check it out again when that comes out haha. Don't have much confidence in cooking up my own mobs when I dont have a point of reference, excited to see it though.

Is heart of light a throne or invoker talent? My gut feeling is that it's an Arklight talent because the other two thrones have a talent called heart of X

WHOOps yeah Heart of Light is supposed to be an Arklight talent.

This game looks absolutely phenomenal on a read-through but I'm wondering, do you think it'd be a good fit for an FFXIV campaign? The mechanics are so elegant, but I'm just wondering what callings I could relate to which Jobs and so on. 

Just dropping in to say: *vibrating excitedly*

(honestly though this looks so rad, Matty)


are we commenting on the "page XX" references?

Yep! I just swapped out the document with an updated version that finalized all the Pg. XX's to reference the correct page numbers.


EAGERLY anticipating the official release!!