A 1982 ShootEmUp created by Creator/{{Sega}}, ''Zaxxon'' was the first UsefulNotes/ArcadeGame to simulate a 3-dimensional view by using IsometricProjection, a form of '''axon'''ometric projection (hence the name of the game). The game scrolls diagonally through enemy fortresses and outer space as the player's ship dodges the shots of enemy fighters and force field barriers, finally encountering the evil armored robot Zaxxon. Handicaps include the ship's constantly dwindling fuel supply (replenished, as in ''VideoGame/{{Scramble}}'', by shooting fuel tanks), and a homing missile that will target the ship if it flies too high. The ship's altitude is indicated on a gauge and by shadows cast on the surface.

''Zaxxon'' received multiple ports to home computers and consoles, though the diagonal-scrolling IsometricProjection was not retained in the UsefulNotes/{{Atari2600}} and UsefulNotes/{{Intellivision}} versions. A MissionPackSequel, ''Super Zaxxon'', was released for arcades; it replaced the robot boss with a trio of fire-breathing dragons (as well as replacing the space sequence with an underground tunnel, and generally making everything faster). Sega went on to produce two similar isometric arcade games: ''VideoGame/CongoBongo'' and ''Future Spy''.

Sega later released two console sequels that were considerably different:
* ''Zaxxon 3-D'' (1987) for the UsefulNotes/SegaMasterSystem exchanged the isometric view for an into-the-screen view, the better to take advantage of the 3-D glasses packaged with the game.
* ''Zaxxon's Motherbase 2000'' (1995) for the [[UsefulNotes/SegaGenesis Sega 32X]] went back to the isometric view, but ships were now rendered in bleeding-edge polygonal graphics.
!!''Zaxxon'' contains examples of:
* CameraScrew: Due to IsometricProjection perspective, it's often frustrating to judge the height of your plane in relation to the terrain. There's an indicator on the side of the screen, but it's still difficult.
* DeadlyWalls: Big walls have small gaps to fly through.
* DolledUpInstallment: ''Zaxxon's Motherbase 2000'' is, outside of haveing isometric perspective, actually not related to ''Zaxxon'' at all. The game got ''Zaxxon'' moniker only in the North America; it was originally titled ''Parasquad'' in Japan.
* EveryTenThousandPoints: You get a bonus fighter at 10,000 points.
* OminousPipeOrgan: The FinalBoss [[https://www.youtube.com/watch?v=9PDqkRJZQHQ theme]] from ''Zaxxon's Motherbase 2000''.
* SpaceIsNoisy: Would you believe "space wind"?
* WordPureeTitle: The title ''Zaxxon'' came from the word "axonometric projection", and is also the name of the FinalBoss.