Navy Blue 90 is one of those weird little Game Boy gems that slipped under the radar—it's a submarine sim, but way more arcade-y than you'd expect. You're basically piloting a tiny sub through grid-based maps, dodging mines and enemy ships while trying to complete objectives. The controls take a minute to get used to (moving in cardinal directions only feels stiff at first), but once it clicks, there's something oddly satisfying about sneaking past patrol boats.

The pixel art has that classic Game Boy charm—your sub looks like a chunky metal tube, and explosions are these satisfying screen-shaking bursts. Don't go in expecting depth (no pun intended), but if you're into retro oddballs, it's a neat time capsule. Just watch out for those sudden torpedo ambushes.