'Colostle' is a solo RPG rulebook and setting for adventure in the impossible roomlands of this preposterously massive castle. Use a standard deck of playing cards and check your draws against prompts and rules in the book to see what you discover on your adventures, and then use those prompts combined together however you want, to write sagas of your exploits and legend in your adventurer's journal...

This new edition of the core rulebook contains all the rules you need for countless adventures in the Roomlands of the Colostle. Featuring sections on creating your character, 6 starting classes, exploration rules, combat rules, detailed location information and biomes, cities and much more - all accompanied by over 100 illustrations. This volume also includes a starter campaign 'The Search for the Seastone' and rules for two-player co-op play!