Magnavox's Odyssey or "PONG Console" was the first console to be released in 1972. It contained two strangely shaped controllers, with which the players moved two dots on the screen. This has resulted for the players to being able to play limited games, which they change by putting another cartridge and placing .... wallpaper on their TV screen!
Video games first appeared in 1962 with Spacewar! and in 1966 with Sega's Periscope. The 1970s, however, were significant as they entered peoples homes for the first time. In 1966, German Ralph Baer began working on a new console on behalf of the American company Magnavox. This is the Odyssey launched in 1972.
Odyssey sold 350,000 pieces. It works with floppy disks and was based on the Atari "Pong" game that was launched the same year as an Arcade. Odyssey games are played with at least 2 players (except for some very rare pieces that had HAL Artificial Intelligence Unit installed) and are variants of Pong. There is even an accessory, the Light Rifle Shotgun, with which players have to shoot pixels on the screen.
In the video below you can watch a 1972 promotional film for the original Magnavox Odyssey video game system.