DeepMind’s AI has been setting records and beating humans in complex games for some time now, but it’s met its match in Montezuma’s Revenge.

Back in 2015, DeepMind attempted to play various Atari games. The AI was competent in most of the games and became as good at Video Pinball as a human player.

DeepMind notoriously struggled with Montezuma’s Revenge, a notoriously complex game from the 1980s. The AI was unable to learn a path and retrieve even the first...