Note: If you are having problems running this game, e.g. because you are getting a message that your security settings have prevented it from running, then scroll to the bottom of the page for help.

Game instructions:
First select the number of minutes you wish to play, by clicking on it. You can choose to player for either, 3 minutes, 5 minutes, 7 minutes, 10 minutes, 15 minutes or 20 minutes. High scores are kept separately for each time. Then click 'Start new game', to start playing. You control the submarine at the bottom of the screen, and the object of the game is to fire torpedoes at the various ships. Your submarine is equipped with four torpedo tubes, and each time you have fired four torpedoes, you will have to wait approximately three seconds for them to be reloaded, before being able to fire again. Once in a while the enemy will send their special anti-sub cruiser to drop depth charges at you. If your submarine gets hit by one of these, the submarine is destroyed and your game ends, regardless of how much time is left of the game. To pause the game press the key p. If the controls doesn't work, click the game screen with the mouse, to give keyboard focus to the game. You can change the language of the interface by clicking the flags.

Problems running the game:
First of all, to run the game you will need to have Java installed. If you don't have that already, then you can install it from here:

If you still cannot run the game and are getting a message about your security settings, then it's because the newest versions of Java are overdoing security to such an extent that Java applets now as default cannot run unless they are signed by an official certificate authority. That's a bit too much for a simple game like this, but at least there is a way to get it to run without being signed. Simply add my website to your list of trusted websites (if you do trust it). Then instead of the game being completely blocked from running, you will now get a security prompt where you can choose to run it or not. Here's a link to the official instructions on how to add a trusted website: