When people say a game is "isometric," they usually mean it has that tilted, three-quarter view where everything looks like a tabletop of tiny dioramas. You can see the tops of buildings and the sides of characters at the same time, and nothing ever shrinks into the distance. It is one of the most recognisable looks in games, and it has been around far longer than most players realise.
Strictly speaking, true isometric projection means the three axes of space are spaced exactly 120 degrees apart, so no single direction is foreshortened. In practice, most "isometric" games are really dimetric: artists use a tidy 2:1 ratio, where every step sideways moves two pixels across for every one pixel down. It draws cleanly on a pixel grid, which is exactly why it became the default for an entire era of strategy and role-playing games.
Why it feels different from 3D
A normal 3D camera uses perspective: parallel lines converge, distant objects get smaller, and the world has a vanishing point. Isometric art throws all of that away. Parallel lines stay parallel forever, a tree at the back is the same size as a tree at the front, and the result reads less like a photograph and more like a beautifully built model. That flatness is a feature. It keeps gameplay readable, makes tiles snap together perfectly, and gives everything a calm, handmade charm.
The trade-off is that depth can be ambiguous — it is sometimes hard to tell whether a platform is higher up or further back. Good isometric games solve this with shadows, outlines and careful colour, which is a big part of why the style looks so deliberate when it is done well.
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