Stella Deus is a tactical role-playing game co-developed by Atlus and Pinegrow. It was published by Atlus. 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.