Zaxxon

Zaxxon was a video game produced by Sega in 1982. It was a cabinet arcade game (also converted for numerous home computer and video game console systems) which gave the player the experience of flying a space shuttle-like craft through a fortress while shooting at things. The object of the game was to hit as many targets as possible without being shot down.

What made Zaxxon unique was that it was the first video game that had the player view what was happening from an isometric three-quarters perspective, which simulated three dimensions (albeit from the viewpoint of a second person).