What open source platform game was modeled after a Nintendo game released in 1985 that required players to rescue Princess Toadstool?
Super Mario Bros. Super Mario Bros. is a platform video game developed and published by Nintendo for the Nintendo Entertainment System home console. Released as a sequel to the 1983 game "Mario Bros.", "Super Mario Bros." was released in Japan and North America in 1985, and in Europe and Australia two years later. In "Super Mario Bros.", the player controls Mario and in a two-player game, a second player controls Mario's brother Luigi as he travels through the Mushroom Kingdom in order to rescue Princess Toadstool from the antagonist Bowser.
Popeye (video game) Popeye (ポパイ , Popai ) is a 1983 arcade platform game developed and released by Nintendo based on the "Popeye" characters licensed from King Features Syndicate strips and animated shorts. Unlike most platform games, the player cannot jump; the only button is "punch." The game was licensed by Atari for exclusive release in the United Kingdom and Ireland, and featured in an Atari designed and manufactured cabinet. Some sources claim that Ikegami Tsushinki also did design work on "Popeye".