The Ecryme game engine focuses on roleplaying as the game itself is an adaptation of Mathieu Gobarit’s books. The mechanics reward investment in skills, though, rather than luck. The margin of success and failure of the rolls are a thing.
Our world is covered with ecryme, an acid sea turning even the slightest misstep into a death sentence. People have had to adapt to this omnipresent danger. It has become part of our daily lives and we have accepted it.