Command the 688(Improved)-class submarine. Operate over 12 different stations, and sail over terrain of the entire globe. Let training missions develope your skills, then take your submarine and take on single missions and a full campaign. Even go multiplayer and play over the internet, network or modem.
There was to be an expansion pack called Under the Ice, which is supposed to add several new features and new scenarios near the polar region. However, the expansion pack was later cancelled, when the game didn't sell as good as EA expected.
The game's 3D view was so powerful that Sonalysts later released a patch that disables the the 3D view during multiplay. It's available at Patch V 1.07.
The initial version of the game features virtually instantaneous torpedo unload/reload times and incredible turn rates. Sonalysts had to issue a "realism patch" to address this problem.