Unknown Datatech Game
Platform: Atari 2600
Region: USA
Media: Cartridge
Controller: Joystick
Gametype: Licensed
Release Year: 1983
Developer: Datatech
Publisher: Datatech
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Most probably the rarest non-prototype Atari 2600 game known to exist. 

The Unknown Game

Try to reach the symbols at the top of the screen before you run out of energy by walking an invisible path on a randomly generated grid while avoiding UFO's and rocks dropped by birds.
You can choose a new path at the bottom of the screen.

Reaching a Minus:
You loose 300 points.
Return to the beginning of your chosen path to get new energy.

Reaching a Plus:
You gain 1000 points.
Return to the beginning of your chosen path to get new energy.
The flashing UFO's can be destroyed (500 points) by touching them.

Reaching a Sword:
You gain 500 points.
The grid becomes invisible and all paths are walkable now.
Return to the bottom of the screen to get new energy.
The flashing UFO's can be destroyed (500 points) by touching them.

When you get hit by a non-flashing UFO, you will loose 1 life.
When you run out of energy, you will loose 1 life.
Sometimes the paths change position and you will fall off and loose 1 life.
Sometimes you can teleport from one vertical path to another.

The game has a 2 player mode and 8 difficulty levels (the speed increases).

http://www.atarimania.com/detail_soft.php?MENU=2&VERSION_ID=15501
