As part of a study to improve procedural level generation in games, three researchers have trained an artificial intelligence to make playable maps for classic Doom. We’re pretty sure this is how Skynet got started.
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Edoardo Giacomello, Pier Luca Lanzi, and Daniele Loiacono of Cornell University used Generative Adversarial Networks (GANs), a class of AI algorithms used in unsupervised machine learning. They provided two of these GANs with topographical features and images from over 1000 Doom maps, taken from community sites such as the Video Game Level Corpus on GitHub.