THE MAIN MENU
The following two important tasks must be accomplished before you can venture into space.
Select a Game Mode
Press Control Pad ▲/▼ to move the on-screen spaceship next to one of the following game modes:
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One player: Standard Asteroids
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Competition Play: Two players appear on screen at the same time, each with their own bonus lives and score. A player's ship is vulnerable to attack by the other player. However, a player will benefit more if his opponent is alive. This mode requires two Game Boys joined by a Game Link™ cable.
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Team Play: Two players appear on screen at the same time, both sharing extra lives. Here, a player cannot damage the other player's ship. This mode requires two Game Boys joined by a Game Link cable.
In 2-Player Mode, the ship you control will always be the darker of the two. Also, the player who presses Start will control the ship that initially appears on the left.
Choose a Difficulty Level
There are three different difficulty levels in Asteroids. To select one, simply press Control Pad ◄/► to display one of the following:
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One asteroid: Novice. Play begins with two large asteroids on screen. There are no enemy saucers in this level.
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Two asteroids: Intermediate. Play begins with four large asteroids on screen. Enemy saucers are very accurate here.
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Three asteroids: Advanced. Play begins with six large asteroids on screen. Enemy saucers are lethal at this level.
When a two-player game begins, the difficulty level must be selected from the Game Boy on which the START button was pressed. In addition, selecting a 2-Player game will only work if another Game Boy can be detected during display of the Menu Screen.
HOW TO PLAY ASTEROIDS
Again, the object of the game is to use your ship's photon cannon to destroy all asteroids and enemy saucers on the screen. Here's how it works:
Blasting Asteroids
When you blast a large asteroid, it breaks up into two medium asteroids, which spin off in different directions and velocity.
When you blast a medium asteroid, it breaks up into two small asteroids, which also spin off in different directions and velocity.
When you blast a small asteroid, it disappears.
Scoring and Lives
As mentioned earlier, you start with three lives (ships). However, an extra life will be awarded every 10,000 points. Points are awarded for the following:
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Hitting a large asteroid: 20 points
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Hitting a medium asteroid: 50 points
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Hitting a small asteroid: 100 points
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Hitting a large saucer: 200 points
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Hitting opponent's ship (Competition mode only): 500 points
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Hitting a small saucer: 1000 points
The current score and the number of ships (lives) remaining are located at the top of the Game Screen (see Figure 1).
Cooperative High Score is a combination of both player's scores.
Rounds
After all asteroids on screen are destroyed, a new round begins - with the addition of one more large asteroid. This pattern continues until a maximum of six large asteroids appear at the beginning of each round. In addition:
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The speed of play will increase.
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The aim of enemy saucers will become more accurate.