Move back slightly when you encounter a mine. They're much less sensitive from the rear. Avoid jet ski bullets by jumping or ducking. When approaching sharks, move the up and down nut left and right. Octopi and sea monsters are easily thwarted by holding down fire until both missiles are ignited and then releasing. Struggling to dock with a submarine? Put a mini-sub in the gap between the tail fin and the hull, face the left of the screen and move upwards slowly, and the computer takes over the docking procedure for you.

The code is "948411". Arrows indicate the direction of the lifts. Kill white marines and flame thrower troops to get more ammo, stand over the body and search thoroughly. To get the code of an official, you must shoot him with a gun, not a flame thrower. To enter computer codes, stand by a terminal, push up and you'll be asked for a code. Two of the codes are:

1. Transmit message: 1st or 2nd transmission official
2. Open door: 1st or 2nd machine official

To open the reactor door, use the terminal next to the reactor. The computer confirms the bomb is planted. Go out, use the same terminal you used to open the door and transmit the following: "OABERYAMD". Now type "END" at the ready prompt and run like hell to the conning tower.

From the start, go Right, Down, and Right. Shoot the second official and take his code. Now go Left and Up. Enter through the door, go Right and shoot the first official and take his code. Go Left, and enter through the door. Next, go Up, Right three times, Down twice, Right, Up, and enter through the door. Go Down, and type: "EMERGE" on the computer followed by the first official's code. Now type: "STOP MOTOR" and enter the first official's code again. No go Left, Up, Left twice, and enter through the door. Then go Up, Right four times, Down, and enter through the door. Go Right and enter through the door. Go Right and enter through the door. Go Right, Down twice, and Left three times. Shoot the Transmission official and take his code. Then go Left and type on the computer: "OPEN DOOR". Then enter the second officials code. Go Left and set the bomb on the left side of the screen. Now, go Right five times, Up twice, and Right. Type "TRANSMIT" on the computer, then enter the transmission officials code. Now enter: "OABERBYAMD" and then go Left twice, and Up three times. Go to the left side of the screen.