Star Soldier is a 1986 vertically scrolling shooter video game developed and published by Hudson Soft for the Nintendo Entertainment System and MSX. It is the first game in the Star Soldier series. The player pilots the starship "Caesar", traveling through space stations occupied by powerful supercomputers known as "Starbrains" who threaten the galactic empire. Star Soldier greatly resembles the earlier arcade game Star Force. The MSX version of the game was brought to the SG-1000 in Taiwan.

A strange and evil presence is lurking in space. Crushing everything in its path, destroying spaceships full of innocent people, the brutal Starbrain is threatening the entire Galactic Empire. Starbrain, a giant computer programmed only for destruction, inhabits an enormous space station, guarded by enemy ships and robot creatures. To penetrate the station is a job for the most skillful and experienced Star Soldier - you! You'll be piloting Caesar, the fastest fighter ship in the Galactic Fleet, with an awesome arsenal of weapons at your finger-tips. Only you can end the fearsome Starbrain's spree of destruction, and restore peace to the galaxy!