Harbour Attack
arcade game for Commodore 64, 1984

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DESCRIPTION
Captain your submarine through dangerous
waters to reach the enemy port then de-
stroy their cargo ship. Among the many
onstacles you must avoid any mines, sub-
marine nets, and aeroplanes.
HOW TO PLAY THE GAME
Stage One
Press the FIRE button to start the game.
To complete the first stage of your
mission you must use the joystick to
guide your vessel through the submarine
nets. You must not touch the nets or the
mines which are between them. You cannot
reverse your submarine, however you may
pause at any point to let a mine pass
by. You must negotiate this stage of the
game before your limited air supply runs
out. Your submarine cannot travel at too
great a depth or it will be crushed by
the pressure of the water. The safe
maximum depth is indicated by the red
'LIMIT' triangle at the top of the
screen and your actual depth is shown by
the green strip below it.
Stage Two
The next stage of the mission is one of
survival. Enemy ships and aeroplanes try
to bomb you out of the water. The ships
drop depth charges which you must avoid,
and when you rise to the surface they
fire torpedoes at you and the aeroplanes
drop bombs on you. Use the FIRE button
to shoot torpedoes at the ships and
missiles at the aeroplanes when you are
on the surface of the water. Your
weapons have a limited range so you must
fire when quite close to the ships in
order to have any effect. To fire at the
aeroplanes you must push the joystick
forward as you press the FIRE button.
Your air supply is limited, so you must
keep returning to the surface in order
to replenish it. If you fail to do so
you will be destroyed when the air
supply runs out. When you have destroyed
enough ships and aeroplanes you auto-
matically move on to the third and final
stage.
Stage Three
To complete your mission you must de-
stroy the cargo ship which is sailing
into port. The bow of your submarine can
be seen at the bottom of the screen as
barges float back and forth between you
and the target cross on the ship. Posi-
tion your vessel then fire between the
barges to destroy the ship. You may
steer the missile onto the target using
the joystick.
Notes
You have four submarines to locate and
destroy the target. If a submarine is
lost it is replaced by another at the
same stage of the mission.
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Some useful keyboard shortcuts
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[PAUSE] - stop/continue game
[F9] - quick load game state
[F12] - quick save game state (still stored after leaving the site)
[F11] - toggle fullscreen mode
[ScrollLock] - quick switch control ports
[PageDown] - make a screenshot (320x200)