When I think of stealth under the sea I get an image of Solid Snake stumbling off the North Pier after a drunken night out in Blackpool. Depth Team have their own ideas though, and they're currently working on an underwater multiplayer game known simply as Depth.
The game pits a team of divers against a team of bloodthirsty sharks, with the objective of the divers team being to find and steal treasure while, predictably, the shark team tries to make a quick snack of them.Divers have to be constantly aware of their surroundings, making use of the underwater scenery to stealthily make their way towards the treasure. Sharks have limited vision so have to rely on any disturbances in the water and the divers heartbeats as they swim around, although obviously when they finally encounter a diver they're overwhelmingly powerful and hard to fight off. Being on the divers side looks like it's going to be a very tense experience.
It sounds like an intriguing idea for a game, but you also have to bring up the question of how much long-lasting appeal a game like this will ultimately have. There's so release date yet, but you can follow the progress of the game over on Depth Team's website.