DemonStar is a shareware video game developed by Mountain King Studios, based on their earlier game Raptor: Call of the Shadows. It is a top-down vertically scrolling shooter 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. At the end of each level is a boss ship that the player must destroy.