Question: What open source platform game was modeled after a Nintendo game released in 1985 that required players to rescue Princess Toadstool?

Context paragraphs:
Mifos Initiative: The Mifos Initiative is a U.S. based non-profit that exists to support and collectively lead the open source Mifos X project.  Founded in October 2011, the organization encompasses a community of financial service providers, technology specialists, financial services experts and open source developers working together to grow the Mifos X open source platform for financial services.  Its goal is to speed the elimination of poverty by enabling financial service providers to more effectively and efficiently deliver responsible financial services to the world's 2.5 billion poor and unbanked.

Open Platform for Robotic Services: The Open Platform for Robotic Services (OPRoS) is an open source platform based on components.  It provides an Integrated Development Environment (IDE) for developing components and monitoring robots, a robot framework for controlling the components in the robot and managing their faults, a simulator for simulation of components and contents, a server for managing the component repository and agents for execution of the proxy services instead of the components in the robot, and a test and evaluation system for components, contents, and developed SW.  Especially, The IDE consists of Component Editor, Component Composer, and Task Editor.  OPRoS was started in 2007, the source code has been available since August 2009.

Artificial Intelligence for Digital Response: Artificial Intelligence for Digital Response (AIDR) is a free and open source platform to filter and classify social media messages related to emergencies, disasters, and humanitarian crises.  It has been developed by the Qatar Computing Research Institute and awarded the Grand Prize for the 2015 Open Source Software World Challenge.

OpenLaszlo: OpenLaszlo is a discontinued open source platform for the development and delivery of rich Internet applications.  It is released under the Open Source Initiative certified Common Public License (CPL).

Yoshi's Safari: Yoshi's Safari, known in Japan as Yoshi's Road Hunting (ヨッシーのロードハンティング , Yosshī no Rōdo Hantingu ) is a video game for the Super NES in 1993.  "Yoshi's Safari" takes advantage of the Super Nintendo's Mode 7 capability, which allows backgrounds to be transformed by rotating or stretching it.  This is also the first Mario game released outside Japan to refer to Princess Toadstool as "Princess Peach" prior to Super Mario 64.

UpStage: UpStage is an open source server-side application that has been purpose built for Cyberformance: multiple artists collaborate in real time via the UpStage platform to create and present live theatrical performances, for audiences who can be online (from anywhere in the world) or in a shared space, and who can interact with the performance via a text chat tool.  It can also be understood as a form of digital puppetry.  It is the first open source platform designed specifically for avatar performances.

Secret Maryo Chronicles: Secret Maryo Chronicles, short: "SMC", is a free, open source two-dimensional platform game.  "Secret Maryo Chronicles" has been described as a "Super Mario Bros." clone by "PCtipp".

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.

Hotel Mario: Hotel Mario is a puzzle video game developed by Fantasy Factory and published by Philips Interactive Media and Nintendo for the Philips CD-i in 1994.  The primary character of the game is Mario, who must find Princess Toadstool by going through seven Koopa hotels in the Mushroom Kingdom.  Every hotel is divided into multiple stages, and the objective is to close all doors on each stage.  Defeating a Koopaling on the hotel's final stage takes the player to the following building.

Mega Man III (Game Boy): Mega Man III, known as Rockman World 3 (ロックマンワールド3 , Rokkuman Wārudo Surī ) in Japan, is a video game by Capcom for the Nintendo Game Boy.  It is the third game in the handheld version of the "Mega Man" series.  The game follows the title character Mega Man as he fights the evil Dr. Wily, whose latest attempt to conquer the world involves sucking energy from the Earth's core to power a new machine.  Along with foes from his past, Mega Man must contend with the next robot in Wily's line of "Mega Man Killers", Punk.  "Mega Man III" is an action platform game like other games in the franchise.  Like its two consecutive predecessors on the Game Boy, the game combines elements from two previously released Nintendo Entertainment System (NES) titles: "Mega Man 3" and "Mega Man 4".  In 2013, "Mega Man III" was made available on the Virtual Console of Japan's Nintendo eShop for the Nintendo 3DS.  It was later released in the North American and PAL region eShops the following year.

Supporting paragraphs: Secret Maryo Chronicles Super Mario Bros.
Answer: Secret Maryo Chronicles