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[[Isometric 3D]] was a common technic technique to feature some sort of 3D environment with a 2D display.
Sometimes, a different Parallel Projection was used, but this remains quite similar.
It completely skip the perspective element in 3D.
This was also often used with tactical games ([[HeroquestHero Quest]], [[Space Crusade]])
One of the most notable exemple example on Amstrad CPC is [[Head Over Heels]] hit game.
Isometric was also used in games such as [[Syndicate]] (by Bullfrog) or other real time strategy games on 16bit machines.