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by graffix 913 days ago
GPGPU was possible before compute shaders, but very painful. ShaderToy is the hard way today (and for the last ~15 years).

Simulations commonly target GPU, and a game is just an interactive simulation, so in some respect it's straightforward to write games for GPU. From a utilization perspective, you'll need minimally tens of thousands of dynamic game entities, which is one among many reasons why it's uncommon.