In 1981, the Mario series officially started with the release of Shigeru Miyamoto’s creation - Donkey Kong. Originally released in the arcades, Donkey Kong became a very popular game amongst gamers, eventually spawning many remakes and ports. In 1981, Mario had yet to be called so — rather, he was called “Jumpman” during that brief era; it was only a few years later that Mario Segale would rename the aforementioned character to “Mario”.
Two years later, in 1983, Mario got his own game - using his current name. In the game Mario Bros., Mario and his brother Luigi - who first debuted in this game - were traversing the creature-infested depths of the sewers. This game is Mario’s debut as a plumber. Mario and Luigi had to fight such creatures as Fighter Flys, Shellcreepers and Sidesteppers to clear each stage, while also collecting coins during the levels as payment. Mario Bros. is the 1st Mario game with infinite levels (and last.)