For the binary star, see Algol.DemonStar is a shareware computer game developed by Mountain King Studios, based on their earlier game Raptor: Call of the Shadows. It is a top-down vertical scrolling shooter game with an outer space theme. The game shares many similarities with the Raiden series. DemonStar features various power-ups, including smart bombs and other power-ups which modify the types of projectiles that the player's ship fires.The full version of the game features 18 levels.