How is this perspective called

Question

"Hyper Light Drifter" and other games have an pseudo isometric perspective:

How is this perspective called? Are there any "rules" to it that i can look up ?

Thanks.

Answer 1

The general term is axonometric projection.

"Although there are countless possible axonometric projections, only two are standardized for technical drawings." Your screen shot falls into one of the "countless possible" kinds.