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This question is a follow up to Point buy/structured system for cooperative 4e campaign building?.

I've found a system that is quite close to what we want/need, but there's a catch: it's for 3e and builds on mechanics that are (obviously) not available in our 4e game. The system is called "Castle and Keep" and is featured in the Advanced Player's Guide from Sword&Sorcery Studios (2004).

A quick run down of the system:

  • 4 classes of communities (civilian, military, arcane, religious). Those serve as the "character classes" for your village/city/whatever and define which class skills the community has, as well as reputation and defense stats and the number and list from which feats can be taken.
  • 6 ability scores (force, mobility, resilience, learning, awareness, command). Pretty much the full equivalents to a normal character's abilities, some of these are added to other stats (e.g. skill modifiers). Ability generation is a point-buy system with the number of points depending on the size of the community.
  • 15 skills (appraise, craft, decipher script, diplomacy, gather information, ..., spellcraft, survival, use magic device). These measure the community's capabilities and proficiencies.
  • 22 feats. These are exceptional abilities or possessions of the community (e.g. fertile fields, or heavy fortifications). The feats can have prerequisites and usually grant bonuses to wealth, defenses or skills.
  • Level based advancement. Each community has a level based on its population (thus gaining or losing inhabitants changes the community's level), which affects the community similar to how character level affects a normal PC or NPC (granting skill points, feats, bonuses to stats, special abilities). A community can have levels in multiple classes, so the small village with a wizard living in his tower may be "civilian 2/arcane 1" or so.

Now the question is: how can this system be best modified to

  1. work on a much larger scale (regions and whole nations instead of villages/quarters/cities), and
  2. work on the base of 4e's mechanics (since I don't really want to throw a heavy dose of 3e into an otherwise pure 4e game)
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  • \$\begingroup\$ I posted this answer to your previous question, recommending that you check out the rules from Reign. It avoids adding 3e to your 4e by using a totally different system :). \$\endgroup\$
    – gomad
    May 3, 2012 at 22:59

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To address your second point, most of the system looks like it'd translate to 4E just fine:

  • Keep the classes, abilities and feats the same.
  • Skills can be translated into the standard 4E skill-list, where the points are dependent on Ability Score, +5 if trained (due to a school of learning or somesuch), and potential +1/+2 due to class. This way most communities will have a lot of similarities in their skills--as they should--with most of the differences coming from specialised schools and industries granting +5 to a particular skill.
  • Levelling/Multiclassing: the small village with a wizard sounds like it'd either be a Arcana-trained village, or using a Multiclass Feat for Arcane in the same style as 4E multiclass feats. I'd suggest using the multiclass feats to define who 'rules' the community, as you are only allowed to multiclass into one other class, with the option to put more feats into it to define how powerful or strongly the ruler's effect on the community is.

Some examples:

  • Small village with hermit-wizard, doesn't involve himself in ruling affairs: Level 1 Civilian, +5 Arcana.
  • Small town governed by Church leaders, contains a library: Level 3 Civilian, 1 feat in Multiclass Religious, +5 History, +5 Religion.
  • Remote Monastery, monks in tune with nature: Level 2 Religious, +5 Nature.
  • City under martial law, large army, ruled by a powerful wizard: Level 6 Military, 2 feats in Multiclass Arcane, +5 Arcana.
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  • \$\begingroup\$ My gaming group and I started building a 4E version of the community rules version for our game, using some of your points as things to keep an eye open for. The military part is still WIP, however. ;) Once it gets done and I find the time to translate it (we use German as our language for documents and handouts) I'll post a PDF of it. \$\endgroup\$
    – user2862
    Jul 2, 2012 at 20:27

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