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The Big Old Vault of Relics and Curiosities is an ongoing collection of alternative rules, rulings, systems, and ideas for ICRPG and OSR Games that serves as a source of inspiration for GMs and players.

In this version of the Vault you will find ideas about:

The Joy of Low Hit Points, where we talk about hit points in games and how reducing them and all the math associated can create an unique cinematographic experience for combat.

Armor as Soak and Defense Rolls, and the age old discussion of armor in d20 games - do they make you hard to hit (spoiler: no) or do they stop damage? You decide, with rules for both.

Player-Facing Combat, and the idea that players should always be the active part in any conflict, rolling to hit, damage... And avoid attacks made against them, freeing the GM to do what the GM should do, focus on everything not dice-rolling related.

Luck as an OSR Mechanic, an original mechanic that measures Luck in a dice chain (D4, D6, D8...) and gives players a new way to influence the game and negotiate narrative advantages.

Alternative Wealth Systems, simplifying the math for when no one wants to track every copper and allowing GMs to create the monetary system they prefer for the game, from the classic generic gold pieces to barter and trade systems.

Make an Effort on your next game with new rules for progression on extended actions like chases.

As with all products in this series, this title is offered as PWYW and will receive constant support and update, with new ideas being added regularly - buyers will be notified when a new version becomes available, so if you believe this product to be worth of your support, please return to this page and contribute in the future.

Update Notice!

As of February 27, 2021, this product has been expanded and uptdated with new ideas.

Please notice that this is done by a single amateur author and updated as frequently as possible, based on public interest. Also, this title will remains always a free / pwyw title, but if you consider it worth it and would like to support future updates and expansions, you can always go back to and contribute. All contributions are reinvested in the community (used to buy other independent author's works) and used to sponsor time off my 9-5 job to write.

Happy gaming!

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Product Information
Rule System(s)
File Size:
3.8 MB
Original electronic
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

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For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
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File Last Updated:
February 27, 2021
This title was added to our catalog on January 20, 2021.
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