Noteworthy features

• First game to use a speech chip that talks like a robot.
• Player must complete either bank of drop targets in the lower playfield or face a loss of ball in play. Same goes for multiball: multiball is aborted and the single-ball play continues.
• Game uses 5th scoring display as a bonus counter to count points scored on the lower level. It can be multiplied by the bonus multiplier. G-Force accelerator doubles and triples the points scored below.
• Uses fluorescent displays including status display mounted inside apron.
• Was made in 2 different versions: domestic and export. Domestic games had a double backglass with infinity effect and spinning disk. Export games had a regular single backglass. However, a few examples located in Europe do have an original domestic type double backglass. Export games also had a more simple sound board, without speech.

Trivia

• Gottlieb's first solid-state multi-level multiball game.
• Seen in the 1980’s movie Strange Brew- Cafeteria scene when Doug turns the breakers on.

Backbox ornament(s)

The scorebox features a rotating disc that simulates astronauts going into the black hole.

Video mode

This machine has no dot matrix or video display, so it has no videmode.