New to Sly Flourish? Start Here or subscribe to the newsletter. Listen to articles on Readings and Reflections.

Defining RPGs with Tags

by Mike on 11 May 2026

Over on the Lazy RPG Talk Show I talked about defining the OSR, my attempt to try to better define what separates one RPG from another.

I think it's useful for GMs to be able to describe RPGs to one another and to our groups so we know what separates one game from another and what we might expect when we run a particular game at the table. Terms like "OSR" aren’t really clear outside of Matt Finch's four principles for old school gaming:

I thought better defining the characteristics of RPGs can help us talk about them so today I offer what I like to call "tags". These tags help define various aspects of RPGs so we can better clarify what separates one RPG from another. The list below isn't all-inclusive or definitive. I'm sure you have your own way to describe RPGs but I think taking a shot at defining these tags might help. I also don't expect these tags to become a new IEEE standard or ALA classification guide. But, for me, I think these tags help me talk about what makes RPGs different from one another.

Genre

RPG genres are largely self-explanatory and again, these terms aren't all-inclusive.

System

System tags describe the ruleset a game uses. Here are a few of the big ones.

Character Roles in the World

What roles do the characters have in the world? What are they like compared to common folk?

Gameplay Style

How does the actual game play out? What does it look like when you play?

World Interaction

How do the characters interact with the world and how does the story unfold during the game?

Applying These Tags to Games

What if we take the above tags and apply them to actual games. What does this list look like?

What Do Your Tags Look Like?

When you think about how you define your own favorite RPGs, what terms or phrases come to mind? How do you describe your favorite game to your fellow GMs or your players?

More Sly Flourish Stuff

Each week I record an episode of the Lazy RPG Talk Show (also available as a podcast) in which I talk about all things in tabletop RPGs.

Last Week's Lazy RPG Talk Show Topics

Here are last week's topics with time stamped links to the YouTube video.

Patreon Questions and Answers

Also on the Talk Show, I answer questions from Sly Flourish Patrons. Here are last week's questions and answers.

Talk Show Links

Here are links to the sites I referenced during the talk show.

Last week I also posted a YouTube video on Putrescent Hestor – Dragon Empire Prep Session 65.

RPG Tips

Each week I think about what I learned in my last RPG session and write them up as RPG tips. Here are this week's tips:

Related Articles

Share this article using this link: https://slyflourish.com/rpg_tags.html

Subscribe to Sly Flourish

Subscribe to the weekly Sly Flourish newsletter and receive a free adventure generator PDF!

Get More from Sly Flourish

Sly Flourish's Books

Have a question or want to contact me? Check out Sly Flourish's Frequently Asked Questions.

This work is released under a Creative Commons Attribution-NonCommercial 4.0 International license. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, for noncommercial purposes only by including the following statement in the new work:

This work includes material taken from SlyFlourish.com by Michael E. Shea available under a Creative Commons Attribution-NonCommercial 4.0 International license.

This site may use affiliate links to Amazon and DriveThruRPG. Thanks for your support!