Astrosmash

Astrosmash was born from merging two prototypes — Meteor! and Space Invaders — and became Intellivision's best-selling game. Meteors, bombs, guided missiles and UFOs fell from above with increasing speed while your cannon fired from below. Score could rise and fall: every meteor hitting the ground subtracted points. The Intellivision disc allowed smoother movement than any Atari joystick. Mattel included it as pack-in in some console versions, ensuring widespread distribution.