Sega began working in the 1900's using its popular game system, the Sega Genesis. Sega became a wildly popular game company and began working with its own video game series known as Alex Kidd. Alex Kidd was later beaten out of fame by Sega's new mascot, Sonic the Hedgehog in later games. The very first Sonic the Hedgehog video game was a self titled debut. The game was very famous and thus released its sequel. Other characters in the Sonic the Hedgehog series are Knuckles the Echidna and Miles "Tails" Prower. In 1996, Sega worked with Nintendo, Namco, and Amiga to make Pac-Mania, the first three-dimensional Pac-Man video game. Pac-Mania recieved much popularity in its first year but isn't much spoken about in the twenty-first century. Sega continues to work with Sonic the Hedgehog. Also, Pac-Man games were also released on the Sega Master System, Sega Genesis (known as Sega Mega Drive in other countries), and Sega's final console known as the Dreamcast.