Game brain is a computer programmed to play any kind of game - from chess or Go to poker or video games. A game brain is usually made up of lots of different instructions, like a recipe book full of instructions for playing games. The instructions tell the game brain how to move pieces in a game, when to bet in a poker game, or how to react in a video game. The game brain is programmed to play the game perfectly, which means it will never make a mistake and will always be playing at its best. That means it can be tough to beat a game brain - but it also gives us a chance to learn more about how to play the game better by seeing how the game brain plays!