The objective of the game is to defend the planet from a space invasion (...would you look at that). You do this by controlling a laser cannon at the bottom of the screen that pans left and right and shoots straight upwards towards the descending alien swarm. The swarm consists of 11 columns by 5 rows of different types of aliens, and the random mother that will pan across the screen at the very top. Also, you have 4 shields that help protect you from the incoming alien fire, but they will slowly degrade from the damage taken.
You score by shooting and destroying each alien as they descend upon you. Each different alien is worth a different point score, and the mother ship's point total is random. It only takes one blast from your cannon to destroy a ship, but that becomes more difficult as the swarm steadily increases their descend towards the planet with their own left to right panning motion. You lose when you either run out of lives or the swarm reaches the planet. You earn lives by defeating each incoming wave. After a wave is defeated, a new wave will appear with an increased descending speed, increasing the difficulty as you progress.
You can see the player controlled cannon as it fires upward towards the swam. |
Taito Corp. released 4 more squeals to the Space Invader franchise, ending in 1995. In 2008 Nintendo released the "Space Invaders Get Even" for the Wii gaming console, where you controlled the aliens instead of the cannon.
The game, though very repetitive, is a great classic. It set the standard for most alien shoots and side scrollers for its generation.
References:
http://www.history.com/topics/space-invaders
http://www.brentradio.com/SpaceInvaders.htm
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