[Houshalter]

Small NNs are very fast. This particular NN only has 4 inputs, 2 hidden, and 2 outputs. That's what, 12 multiplications per pass? If you can compress your input down to a few variables you don't need much computation. For an FPS you could probably get away with player coordinates and direction.

I've read that some game devs tried more advanced AIs in FPS games. And the players hated it because they thought it was cheating when it snuck up on them.