Let me take you back... back to a world before pixels. In those days, all people had were lines. A company called Atari had recently wowed crowds with their clever use of lines in a game called Pong, but now this line technology had advanced.

It was 1979, and lines could be made to look like spaceships and big rocks and… (more) flying saucers, as long as you squinted a little. And so, Asteroids was born.

You float in space and shoot the asteroids, but the more you shoot, the more asteroids you create. And be careful: you only have one ship for each 10,000 points scored.

(High scores for Asteroids are reset weekly, every Sunday night.)

Please note: This game is an unofficial clone of the original Asteroids® game and is not endorsed by the trademark and copyright owners Atari, Inc.

Controls:

Left arrow key – Turn left
Right arrow key – Turn right
Up arrow key – Thrust forward
Space bar – Fire missile

"P" key – Pause/unpause game
"Q" key – Quit game
"M" key – Mute/unmute sound
Shift key – Hyperspace

Source: http://www.widgetbox.com/widget/asteroids