Stella Deus (ステラデウス Sutera Deusu), released in the west as Stella Deus: The Gate of Eternity, is a tactical role-playing game co-developed by Atlus and Pinegrow for the PlayStation 2. It was published in Japan and North America by Atlus, and in Europe as 505 Games. The gameplay, which is similar to that of Hoshigami: Ruining Blue Earth, has the player controlling six characters through story-driven tactical missions, revolving around positioning, assigned equipment, and the special skills of individual characters. The story focuses on Spero, a young man who is caught in the middle of a growing conflict between various religious factions, which in turn are being spurred by the advance of the Miasma, a force that will destroy all life.