Shadows of Brimstone™ is a fully cooperative dungeon crawl adventure that mixes Old West and Unspeakable horror themes. Players work together, taking on the roles of Old West heroes like a Gunslinger, Bandito, Saloon Girl, or Preacher to form a Hero Posse, exploring the dark mines around Brimstone, fighting demons and creatures that are entering our world through void portals. The heroes can even step through those portals when they find them, to explore the strange alien worlds on the other side! The game board is randomly generated, as you play, via a deck of Map Cards (one card associated with each board tile). The board tiles are double-sided with Old West rooms or passages on one side and alien worlds on the other!