Slavelords of Cydonia is the first adventure sourcebook for Bad Axe Games' Grim Tales. Set in a time and place of the GMs choosing, Slavelords of Cydonia pits the heroes against tentacled horrors from beyond the stars in a world-spanning struggle to avert a second cataclysmic war. The book features a complete campaign for adventurers level 1-20, in addition to supplementary source material presenting new monsters, spells, technology, races, feats, and talents suitable for any Grim Tales campaign. Slavelords of Cydonia is 100% compatible with the latest edition of world's most popular roleplaying game, and can be played with or without the Grim Tales campaign rulebook.