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One-Shot RPG System Rules: Modern & Horror Setting
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One-Shot RPG System Rules: Modern & Horror Setting

Suggested Price $5.00

Check out the system in action with the live stream of the One-Shot RPG adventure CLOWNS OF FUNLAND.

Have a one-shot idea and need an easy-to-play rules system? The One-Shot RPG system is designed specifically for one-shot adventures in any modern or horror genre. It offers quick character generation and a flexible, comprehensive system using D10s. 

A version of the rules for a Medieval setting is also available here on DriveThru RPG. 

This document includes: 

  • 3-page Players Rules
  • Character Sheet
  • 6-page GM Rules 

If you are looking for an adventure, check our other One-Shot RPG publications, including:


In addition to the story, each One-Shot RPG adventure comes with rules, character sheets, visual aids, NPC sheets, and maps,

This is a pay-what-you-want product. If you want to support One-Shot RPG publications, then please donate a few dollars or leave a review. 

If you have any questions or suggestions, send us an email at

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Discussions (1)
Customer avatar
Roslyn J March 24, 2021 2:16 am UTC
Is this a “roll under” system?
Customer avatar
David D March 25, 2021 2:17 am UTC
Hi Roslyn. The system uses D100 and you have a % chance of success. So if your ODDS are 70%, you succeed if you roll equal to or less than 70. The default ODDS for a feat/skill is 50%+Skill modifier which can range from +0% to +30%. Depending on the situation, the GM might assign lower ODDS such as 10%+, 30%+ etc. Let me know if you have any other questions?
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Product Information
Rule System(s)
File Size:
2.91 MB
Original electronic
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File Last Updated:
March 01, 2021
This title was added to our catalog on February 26, 2021.