A Nintendo DS tech demo from 2004 is now a full 3DS game

One of the original tech demos for the original Nintendo DS back in 2004 was a little submarine game. This game is now on the 3DS with the name Steel Diver. You take control of a submarine and work you way through a labyrinth of obstacles and enemies. All the controls are on the touch screen with levers and switches used to control your submarine.

Nintendo is aiming to make this one a full game, theyve been working on it long enough, so why not?