Released in 1976, the Magnavox Odyssey 300 was different in design from the Odyssey 100, 200, 400 and 500.
Firstly, it was powered by a single chip instead of a multiple chipset. There was also only one knob per user instead of three. The system included the same games as the Odyssey 200 : Tennis, Hockey and Smash. All games had 3 levels of difficulty.
The Odyssey 300 was the second system to use a single chip. Namely,the GI AY-3-8500 CPU from General Instruments, which had already been used in the Coleco Telstar.
As with all the Odyssey machines around this time, it was powered by six batteries or an external ac adaptor.
Just like the 200, the Odyssey 300 later saw variations of the system being released.
The Odyssey 2000 was released in 1977 using the same chip set as the 300. The major addition was a fourth game. The new game was called Practice and was a 1 player game. Apart from the additional game, it was the same system as the 300 (even though 2000 suggests an entirely new system).
Also released in 1977 was the Magnavox Odyssey 3000. It offered the same games as the 2000 and used the same components. However, it was housed in a much improved case.
The system also boasted detachable paddle controllers, a first for any Magnavox console.
The video below shows you the Odyssey 3000 in action (Hockey).