Sega developed the DOS science fiction shooter game Zaxxon in 1984.
Zaxxon is currently abandonware, runs on DOS and can be played in a isometric - 2.5D perspective in single player, multiplayer (hotseat) modes.
Zaxxon is a conversion from an arcade coin-op machine. It's available for download.
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In 1982, Milton Bradley made a Zaxxon board game.
In 1982 Sega released Zaxxon as a tabletop game and a handheld version as well.
players: single player, multiplayer (hotseat)
input: keyboard, joystick
sound: PC speaker