Soulstar is a hybrid rail shooter/third-person shooter video game developed and originally published by Core Design for the Sega CD in North America in September 1994, Europe in October by Core Design, and later in Japan by Victor Entertainment on December 22. When the ancient Myrkoids alien race arrive upon the titular solar system to drain its planets from their resources and destroy them, it is up to Bryk Hammelt of the Cryo-Commandos warrior race to eliminate the Myrkoids by piloting his morphing fighter craft named the Aggressor. As the penultimate title developed by Core Design for the Sega CD, Soulstar features heavy use of the scaling and rotation capabilities of the add-on, similar with other titles on the system created by the same developer such as Thunderhawk and Battlecorps, which featured the same pseudo-3D graphical style. It is inspired by Sega's 1988 arcade game Galaxy Force II. Upon release, Soulstar received praise from critics for its technical achievement on the hardware, soundtrack and multiple playstyles, though it received criticism for the repetitive gameplay. Nevertheless, the game was named "Best Shooter" on the Sega CD by GameFan. Ports for the 32X, Atari Jaguar CD and PC were in development by Core Design, but they were never released.