solo rpg solo play game master table method listen narrative cheat sheet faq summary oracle random generators ai voice podcast combat solo theme inspiration strategy creativity free guide experiment beginner review scene exploration story rules list demo emulator paid module conflict solo gm published expansion video dungeon crawl roleplay improvisation text-based problem solving gameplay play supplement cheat gwydion shadow dark workbook tweaks drivethrurpg choose your own adventure criticism hexcrawl ian irvine overview crunch module imagination hex-crawl journaling exercise budget tips wisdom free module main page 2d6 dungeon solodark