Play Navy Blue 98 Online

I first came across Navy Blue 98 as one of those original Game Boy releases, a cartridge with a zero as its identifier. It was developed by a company called Natsume, known for a few other titles on the system. This was during a time when the Game Boy library was expanding with many different kinds of adventures, and this one fit right in as a straightforward action game.

You control a small, blue submarine pilot navigating through underwater caverns. Your main goal is to explore each stage, searching for a hidden key that unlocks the exit to the next area. The core mechanics involve maneuvering your sub through tight passages, using a limited supply of torpedoes to destroy enemy creatures and break through certain walls. You also manage a constantly depleting oxygen meter, which forces you to find air tanks scattered in the environment. The pacing is deliberate, and the difficulty comes from the maze-like layouts and the pressure of your air supply running out. It feels tense and methodical, like a careful undersea scavenger hunt where a single wrong turn can leave you stranded.