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Published by Samuel Penn.

Also, see my profile for things that interest me.

Glendale Website - My main web site.

Yags - Main site for yet another game system, a generic GPL'd tabletop RPG.

Yagsbook - Documentation on the Yagsbook RPG documentation format, a Sourceforge project.

Mapcraft - Documentation on world mapping tools, another Sourceforge project.

Midnight Saga - An Ars Magica campaign.

Active Topics

The current topics are currently under active development (relatively speaking).

Yags is Another Game System - Game design notes for Yags, a Free roleplaying game system I use as the core system for most of my campaigns.

Yagsbook - Notes on an XML based documentation system I use for documenting Yags and related campaigns.

Full Thrust - Notes on Full Thrust

Stargrunt - Notes on Stargrunt.


Samuel Penn

Other places I can be found:

I can be reached using either email, or via instant messenger using XMPP (e.g. Jabber or Google Talk). In either case, my address is sam at



  • In Search of Memory: The Emergence of a New Science of Mind, a book about how memory (and the mind) works from a biological perspective. Quite interesting, though I'd prefer it to skip the autobiography bits.
  • Sniper, a book about the history and tactics of sniping. Straightforward and an interesting read.


  • Traveller, running a Traveller game using Yags.



In Yags, characters gain experience points during the game which they can then use to spend on skills. This gives reasonably fast progression in short periods of time, and doesn't really take into account training or study. For Traveller, I'd prefer something somewhat less gamey, and closer to how Classic Traveller implemented things.

Down time

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· 01 Jul 2007 · Samuel Penn

Yags Snipers

This is the first in a series of articles that looks at how well the Yags rules model the real world. Yags is meant to be have a crunchy and realistic base, so it's important that what the rules say do make some sort of sense.

Currently I'm looking at a lot of rules for firearms in modern settings, and one of things that really needs to get finalised is how effective guns are at long ranges. Yags sort of assumes that most people with firearms experience are actually pretty rubbish at anything other than very short ranges, especially in a real firefight. A well trained soldier however is more than capable of picking off people at range. Here are the current rules.

Snipers in WWII

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· 01 Jul 2007
sam.txt · Last modified: 2015/02/04 22:40 (external edit)