Jellyfish games: lots of games of this kind you can find here

SubmarineS | Price: $19.95 | Size: 3.8 Mb

Destroy opponent submarines before they destroy you. Explode them with slowly falling profundity charges while avoiding their mines. There are some types of sub every with various ways of moving and shooting. The game has superb rendered 3D graphics, music and sound effects. The demo variant has 10 levels.