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OSR Cosmic Horror Solo Roleplaying
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OSR Cosmic Horror Solo Roleplaying


OSR Cosmic Horror

Solo Roleplaying


Compatible with Eldritch Tales: Lovecraftian White Box Role-Playing(TM)

This is a rules supplement that allows you to play Eldritch Tales without a Game Master. The rules pick out the suggested optional rules from within Eldritch Tales that best suit solo play, and then add in randomised plot hooks, question and answer rules and some unique game mechanics to help bring some of the mystery of the classic Lovercraftian investigation.

These rules are an extention of my best selling OSR solo rules but introduce several key modifications to those rules light solo rules. 

The 'oncoming horror' mechanic introduces a way to moderate how and when the dark forces will come after you, when you know too much or are too dangerous.

I have integrated the insanity system to make it more playable, for a solo character.

More features are demonstrated in the actual play video below. 

Solo is a perfect way to learn a new game, test your first adventures and going beyond just making characters when you are first getting to know the rules.






Copyright©2020 Parts Per Million Limited

This product was funded through my Patreon. To find out more follow the link to the Parts Per Million Publisher site.

Other solo rules you may be interested in:

new releaseDungeon Crawl Classics and Hubris Solo Rules  D100 Cthulhu Modern  OSR Fantasy Solo Roleplaying  Stars Without Number Solo Adventures  Sole Survivor, Solo Roleplay Apocthulhu  Solo Roleplaying Warlock!  Play Chivalry & Sorcery Solo  Play Mork Borg Solo  Into The Odd meets Gamma World  Cepheus Engine Solo Roleplay  HACK Solo - Roleplaying The Black Hack without a GM.  HACK Solo - Roleplaying The Black Hack without a GM.  ICONIC Hero - Superhoric solo play with ICONS Assembled  Operation Solo Endeavor - WWII Operation Whitebox  Blades in the Dark Solo Rules  Grim and Perilous solo roleplay  Fate Solo Rules  239218-thumb140.jpg  5e Solo Adventures  A Lonely Knave, Solo Roleplay using Knave  Savage Worlds Solo Play Guide  Solo Roleplaying Call of Cthulhu  Symbaroum Solo  303622-thumb140.png  Forbidden Hero - Solo Roleplaying in the Forbidden Lands  Solo Roleplaying Tales from the Loop  Tiny Solo Dungeon Rules  282609-thumb140.jpg  Storypath Solo Rules  Shadow of the Demon Lord solo rules  Maze Rat, Solo Roleplay using Maze Rats  Lone Star, Solo Roleplay using Mothership-RPG  Cosmic Horror Solo Roleplaying-Rules for Whitebox Eldritch Tales  ICRPG Solo - Index Card RPG solo  Playing The Lore System solo  Solo Roleplaying Dungeon World  Solo Roleplaying 13th Age  Dark Stalker Solo Roleplaying-Rules for DSDS  Solo Laser - Solo Roleplaying in The Bleed  Capers Solo  Solo roleplaying in an anime world  Solo Roleplaying compatible with GURPS and other d6 systems  Solo roleplaying using Castles and Crusades  HARP/Rolemaster Solo Play  Sagas of Midgard Solo Roleplaying   Pugmire Solo Rules  286375-thumb140.png 

Cut Up & Non-Authoring Solo:

Cut Up Solo 1001 Nights  Cut Up Solo Barsoom  Cut Up Solo Beowulf  Cut Up Solo Deathworld  Cut Up Solo Supplement for Lovecraftian Dialogues  Cut Up Solo Supplement for Fantasy Dialogues  Cut Up Solo Oracle based on M R James A Thin Ghost and Others  Cut Up Solo Oracle based on HP Lovecraft's The Case of Charles Dexter Ward  Cut Up Solo Oracle featuring Dracula  Cut Up Solo Oracle featuring Conan 

Solo Oracle Card Decks

Solo D100 Cthulhu Modern  Solo Troika! 

Complete Solo Game Systems

Cepheus Engine Solo Roleplay  286375-thumb140.png  286375-thumb140.png  286375-thumb140.png

 Customers Who Bought this Title also Purchased
Reviews (0)
Discussions (1)
Customer avatar
Aaron F August 21, 2020 4:51 am UTC
To what extent is this product compatible with other OSR Lovecraftian games? I have Silent Legions and while not solo out-of-the-box, it does provide quite a few GM tools useful for the Soloist. I was thinking about combining it with this system.
Customer avatar
Peter R August 21, 2020 9:51 am UTC
I don't know Silent Legions. (Is it good?)
The best answer I can give you is this.
1. Go to the Full Size Preview, or if that gives you a 404 then use this link:
2. That is the entire PDF as the preview. The only difference is that this has a great big SAMPLE watermark.
3. Decide for yourself if this will work for you.
I don't want you to spend money on something that is simply not what you need.

DriveThruRPG does not support Community Copies. I always put the full PDF as the preview. If you cannot afford the $5 price tag, you are welcome to use the preview.

I hope that is an answer for you.
Customer avatar
Aaron F August 22, 2020 6:10 pm UTC
It is good! If Lovecraftian OSR is something you're interested in, I'd strongly suggest checking it out. It has straightforward mechanics and random tables for everything: generating your own mythos, generating eldritch locations (both on earth and in "other dimensions"), creating magical artifacts and weapons, etc. To get the full use out of it, you'd probably have to play a full-on campaign as opposed to a one shot. What it doesn't have is something for "automating" the behavior of the threat the way you propose. I will most likely make use of your system in that capacity. Thanks for your response!
Customer avatar
Joseph D January 15, 2021 2:24 pm UTC
Silent Legions is great. It is made by the same guy who made Stars Without Number. It works closer to first edition Stars Without Number.
Customer avatar
Peter R January 15, 2021 2:34 pm UTC
I have spoken to Kevin Crawford, and bought Silent Regions. At some point in 2021 there could be a Silent Legions themed set of solo tools.
Customer avatar
Aaron F February 20, 2021 3:04 pm UTC
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Silver seller
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File Last Updated:
August 21, 2020
This title was added to our catalog on August 10, 2020.