A downloadable book

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What is OZR?

OZR is a lightweight framework for running OSR-ish adventure games, inspired by 2400 by Jason Tocci, Freebooters on the Frontier by Jason Lutes, Into the Odd by Chris McDowell, Mausritter by Isaac Williams, So You Want To Be An Adventurer? by Jared Sinclair, and a bunch of old editions of D&D.

It includes a very lightweight system for creating characters, avoiding danger, tracking injury and exhaustion, travel, and improving your character through experience, as well as advice for refs on preparing for play, building encounters, and running the game.

It was written by Oz Browning, with development and editing by Matthew K, and illustrations by Bert of Bertdrawsstuff.

Print version

The physical version of OZR is available from Rook's Press and ratti incantati (including a download code for the PDF version), printed by Footprint Workers Co-op

CategoryPhysical game
Rated 5.0 out of 5 stars
(51 total ratings)
GenreRole Playing
TagsMinimalist, OSR, Tabletop role-playing game


Buy Now$5.00 USD or more

In order to download this book you must purchase it at or above the minimum price of $5 USD. You will get access to the following files:

OZR 1.1.pdf 10 MB

Download demo

OZR 1.1.md 12 kB

Development log


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No no no. Again, what a grate job! Crossing out Traits as you get injured/conditioned is awesome. Again, piece of art


and to you! Hope for more artwork 😉


In the context of all the other lite OSR systems, OZR remains a real underrated gem in my opinion. It’s executed slickly with a very approachable style and layout. The rules are elegant - essentially a one stat system - and well suited to beginner players. Really neat stuff. I feel fortunate to own a physical copy.

Thanks, so kind!


Another version of the character keeper - it has all of the equipment and spells and players can just choose the one they want from a drop down. It'll then pull in the right information. 


That’s great!

I really dig this, OZ. Nicely thought out and explained. Great for FKR games. Nice work!



I've read going on 300 games now of several sorts but this just became my favorite OSR game I've read so  far by a pretty wide margin


Thanks! Glad you like it!

Am I right in thinking that all Saves need to roll a 1 to succeed based on PC’s starting with 1 Luck?

For a starting character, yeah.

Tough stuff!


It gets better once you survive a couple of sessions, but at first, yeah, avoid rolling!


I love the cleanness of XP/advancement here! This is a really lovely set of procedures and I’m glad to see it’s live.

Thanks Sean!