 The game uses the Gamebryo engine, known for its use in "" and "Fallout 3".After the initial release of "Ego Draconis", Larian was interested in releasing an updated version that would fix many of the bugs and issues with the first game and improve the performance of the engine.At the same time, they developed an expansion that would come after the end of the game, as many people had complained that the original ending of the game had been unsatisfying.