20 em 1 is a compilation of 20 games developed and published by Tec Toy for the Sega Master System platform.
20 em 1 was only released in the country of Brazil. The game was released only with the Tec Toy Sega Master System III collection as a bundle with some other games. Since the game was released only in the box with this system, no box art exists for it. All 20 games contained in 20 em 1 are original games developed by Tec Toy.