I used to be an AI programmer working on video games, and I’m currently trying to learn machine learning. As part of this I find myself having to repeatedly explain why video games don’t use machine learning. People seem to find it interesting enough because it’s not just the obvious reasons (machine learning is hard and far from solved for game playing) but it’s also about developer control and about making an understandable game for the player. Video game AI is designed to deliver a certain experience, which is more difficult to do with machine learning. So this blog post lists the main reasons why video game AI does not use machine learning.