Isometric projection is a technique that has been used in computer games since at least the early ’80s. It’s a quick and efficient way of simulating a three-dimensional space, giving you the illusion of depth without a lot of the costly perspective calculations you have to do in “real 3D.” In the early days, most video games were top-down or side-scrolling. Zaxxon (see Figure 3-1) and Qbert (see Figure 3-2) were the first commercial isometric games.
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