Head On is an arcade video game developed by Sega/Gremlin and released by Sega in 1979. It's the first maze game where the goal is to run over dots. Designed by Lane Hauck at Sega/Gremlin in the United States, it was the fourth highest-grossing arcade game of 1979 in both Japan and the US.

Space Invaders is a 1978 shoot 'em up arcade video game, developed and released by Taito in Japan and licensed to Midway Manufacturing for overseas distribution. Commonly considered to be one of the most influential video games of all time, Space Invaders was the first fixed shooter and set the template for the genre. The goal is to defeat wave after wave of descending aliens with a horizontally moving laser cannon to earn as many points as possible.