Nintendo quite like to announce games out of left-field, and these games sometimes disappear quietly off the radar. Games like Cosmic Walker, or Line Attack Heroes. Perhaps this is a game that won't go anywhere, though. It does have a radar of its very own, afterall.
Steel Diver appears to be a side-on submarine simulation game. Players will take control of the submarine with a very technical looking touch-screen display. You also appear to be able to blow things up, so that's nice.
First screens:
Check out the album for more.
Are you looking forward to some deep sea adventures?