Axonometric

Axonometric projection, perhaps more commonly known as "isometric projection" and also known as "forced perspective", is a way of presenting simple 3D graphics which is particularly well-suited to machines of small memory and low power, hence it was popular from the start of the 8-bit era. It is still sometimes used today.

It consists of a bird's-eye view from an upper corner of the room, so that objects always appear the same size wherever in the room they are; this saves having to use memory and processor power for scaling.

Notable games which use axonometric projection
(This is not intended to be a complete list)
 * Zaxxon (named after the technique, was probably the first use of it)
 * Knight Lore
 * La Abadía del Crimen
 * Game Dev Tycoon