This document summarizes the initial brainstorming, theme, mechanics, and initial playtesting of a board game about Celtic society called "Na Celtigh". The game is for 2-6 players over 2 eras of 5 turns each. Players take on roles like Druid or Bard and collect resources like wealth, knowledge, and faith to build structures, maintain their civilization, and advance to the next era. Buildings provide resources and special abilities depend on the player's civilization. Initial playtesting helped evaluate the game mechanics.