Play Navy Blue 90 (Japan) Online
You plot torpedo paths on a grid while enemy ships swarm in—that tiny Game Boy screen turns every near-miss into a heart-pounding dodge. The AI hunts ruthlessly, making even simple controls feel tense.

Navy Blue 90 is one of those Game Boy games that makes you wonder why it never left Japan—it’s way more intense than you’d expect from a monochrome naval battle. You start off just moving a little ship icon around a grid, but within minutes you’re sweating over torpedo trajectories and frantically recalculating attack angles while enemy fleets close in.
The controls are dead simple (d-pad and two buttons), but the AI doesn’t mess around. I lost my first three matches because I underestimated how aggressively the computer hunts you down. That tiny screen somehow makes every near-miss feel dramatic—when a torpedo barely grazes your destroyer, you’ll catch yourself leaning sideways like it’ll help.
It’s got that perfect balance of luck and strategy, where a bad move can sink you (literally), but a clever ambush turns the tide. If you’ve ever wanted to play Battleship with actual tension, this is it. Just don’t blame me when you lose track of time muttering “one more round” under your breath.

Download Navy Blue 90 (Japan) ROM
You can download this ROM to play Navy Blue 90 (Japan) offline using an Game Boy emulator (Top Emulators).
*This ROM is provided for backup and educational purposes only.