One of the first games I remember playing on my Atari 2600 a million years ago was Pac-Man, which was not exactly a faithful recreation of the co-op arcade version. Now several decades later, NVIDIA trained an AI model called GameGAN to recreate a proper port, and what makes this so interesting is that there is no underlying game engine.

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Source: Hot Hardware – NVIDIA GameGAN Built A Faithful Recreation Of Pac-Man With AI Generated Graphics