This was going to be a heavily modified version of the Shackled City adventure path. The original had too many large dungeon crawls for play-by-post and a bloated cast of NPCs (in my opinion). I shut it down after finishing the first installment, which was inspired by Life's Bazaar and Drakthar's Way.
The rules were based on the Pathfinder RPG Beta, but using the Recharge Magic variant from Unearthed Arcana.
