GOG frequently has some of the best early bird deals on the market when it comes to bonuses, and Disco Elysium continues that trend. From now until October 22, anyone who buys Disco Elysium on GOG will also get UnderRail free of charge. Disco Elysium aims to be the most accurate interpretation of a tabletop RPG in a video game and uses a large skill system to allow users to tailor the experience to their own play style. In the case of UnderRail, you get a truly old school-styled isometric RPG with turn-based combat. Each game has its own spin on isometric RPGs and thanks to this deal, for only $40, you get $55 worth of games.