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This is the universe of Entropy. In the near future of the 2170s, after the chaos of the "Shroud War", the galactic community is recovering in a world of alien political intrigue, criminal underworlds, and esoteric cults, awaken by the now eldritch truth of the universe.

Play as one of the twenty-five playable races, and join factions from outer space, to fight in an intense, dark, and passionate Sci-Fi universe with the ever dreadful push of the eldritch in the background.

Play as mercenaries or explorers, fighting other treasure hunters and looters, or stay in the civilized areas to struggle against reality itself in this mature universe inspired by the works of HP. Lovecraft.


Entropy is a game using a personalized version of the percentile system, using a progression feature without the need for classes or levels and a unique mythos. Players will gain experience as they roleplay their characters, complete objectives, and survive in this punishing experience.

The players will have full freedom on what they will focus their character on, and what they will do to deal with problems in this unrestrained system — the more dangerous, the better the reward.

Try to keep your sanity in check as you risk more and more to get as powerful as possible, or die trying!


The theme of Entropy is to allow a mature group to play in an immersive roleplay game, with the possibility for intense technical combat on top. The Game Masters will have the choice to focus on one or both ideas freely and to inspire themselves from the base game to add more items, spells, monsters, and so much more. The game will have multiple expansions in the future, but the main book is filled with all you need for nights of fun! Keep in mind this book may contain horror, mature, and disturbing themes, which are all consolidated to create a dark future, where hope is what the group needs to be victorious, even if indulging in the evil deeds is also a choice in itself.

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Discussions (2)
Customer avatar
richard F February 13, 2022 10:15 pm UTC
Wow, this is dense. Really interesting. It looks like it was made for a VTT. It needs bookmarks in the pdf to be useful at the table.
Customer avatar
Charly B February 15, 2022 12:24 am UTC
(author here) Thank you. And yes, this game was made with a more PDF-heavy aim with it. Interactivity was my main focus.
Remember that each "blue" word is clickable for viewing! :)
Customer avatar
Charly B February 22, 2020 4:01 pm UTC
I am the author of the book, and after some testing, a few writing mistakes were found. The new version will be up and correct it. Do not be afraid to re-download it if you bought the book previously.

One of the changes is the misnaming of the Therapy skill as the old system ''Psychoanalysis'' skill which is now obsolete. And the critical hit bonus of the Exploding Sun corporation line of weapons (it was 90-100 instead of 1-10, so you would crit fail more instead of critically win).
Customer avatar
Dark O April 20, 2023 8:58 pm UTC
Hey there Charly, long time no see. I was a player in some of your original test games for Entropy! I still have access to my first character sheet, Kora the Zelar. We fell out of contact a while back, but on a whim I looked Entropy up to see if you'd ever released it!

Curious to know if you'd like to get in touch again, even if only to reminisce. Congrats on releasing Entropy either way.

For anyone else who reads this, I haven't played the release version, but the early games with Charly running were a blast, as were my character's psychic powers ;P. If the release is anything like the games I played, which it appears to be, I can definitely recommend it for something similar to a mix of starfinder, call of Cthulhu, and the warhammer 40k rpgs, both mechanically and thematically.
Customer avatar
Charly B July 24, 2023 3:07 am UTC
I definitely remember you, and thank you for your input and comment!
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File Last Updated:
February 14, 2021
This title was added to our catalog on February 14, 2020.