Play Poseidon Wars 3-D (USA, Europe) Online

Poseidon Wars 3-D came out for the Sega Master System in 1990, published by Sega. It was one of the few games that used the system's 3-D glasses accessory, which gave it a unique look among the platform's library. At the time, it stood out as an attempt to bring a more immersive visual experience to home consoles, though it never became a major hit.

You control a submarine, moving through a side-scrolling ocean environment. Your main goal is to destroy enemy ships and submarines while avoiding their attacks. The game uses screen by screen progression; you clear one area of foes before advancing to the next. Signature mechanics include targeting with the light gun peripheral (or a standard controller) and the use of 3-D glasses to create a sense of depth in the underwater setting. The pacing is fairly quick, and the difficulty can be unforgiving, especially in later stages. It feels tense and focused, demanding sharp reflexes and careful aim.