The experience of driving around under the water in the submarine was really quite a trip. There have been some submarine fighting games in the past, but nothing comes quite as close to reality as Massive Development has managed to do with Aquanox. The fog effect gives the first layer of depth and the addition of plankton and floaty things in the water just makes it even more believable and otherworldly. The game comtrols almost exactly like a first person shooter. It's a little different because you're moving up and down through the water as well, but the developers apparently like to use the mouse and keyboard more than a gamepad or joystick.
Movements are smooth and very responsive.
And all of this will be very important as you'll be facing some tough and agile opponents throughout the game. I got a pretty good peek at a couple of the single player levels, one of which will pit you against a super pilot. The guys moves very quick and is surrounded by a circle of turrets, which you'll need to take out while avoiding the other submarine and the other turrets firing at you. Pretty chaotic and a bunch of fun. Another of the single player levels demonstrated the need to hide in the murkier parts of the level and wait in ambush.