Which is the first game system designed for commercial home use? - Gamers Bible explains

The first game system designed for commercial home use did not emerge until nearly three decades later, when Ralph Baer and his team released his prototype, the “Brown Box,” in 1967.
The “Brown Box” was a vacuum tube-circuit that could be connected to a television set and allowed two users to control cubes that chased each other on the screen. The “Brown Box” could be programmed to play a variety of games, including ping pong, checkers and four sports games. Using advanced technology for this time, added accessories included a lightgun for a target shooting game, and a special attachment used for a golf putting game.
According to the National Museum of American History, Baer recalled, “The minute we played ping-pong, we knew we had a product. Before that we weren’t too sure.”

Magnavox-Odyssey The “Brown Box” was licensed to Magnavox, which released the system as the Magnavox Odyssey in 1972. It  preceded Atari by a few months, which is often mistakenly thought of as the first games console.