SuperTuxKart
SuperTuxKart (STK) is a free and open-source kart racing game, distributed under the terms of the GNU General Public License, version 3. It features mascots of various open-source projects. "SuperTuxKart" is cross-platform, running on Linux, macOS, Windows, iOS (beta), Android systems and Nintendo Switch (homebrew). "SuperTuxKart" started as a fork of TuxKart, originally developed by Steve and Oliver Baker in 2000. When TuxKart's development ended around March 2004, a fork as "SuperTuxKart" was conducted by other developers in 2006. "SuperTuxKart" is under active development by the game's community. Gameplay. "SuperTuxKart" gameplay is similar to  that of the "Mario Kart" series, but also has distinct elements, such as collecting and using cans of Nitro. The game features the mascots of several open source projects. For example, Mozilla Thunderbird plays the referee, flagging the start of the race and saving players when they drive off the course. The game supports single player, local multiplayer, WAN multiplayer, and LAN multiplayer modes. Networking modes were introduced in version 1.0. Characters. The official playable characters of "SuperTuxKart" are the mascots of free and open-source projects. The character Nolok does not represent a particular open source project, but was  created by the "SuperTux" project as the antagonist of Tux. The mascots for many other projects are available as add-ons from SuperTuxKart's add-ons website. Plot. Unlike "Mario Kart", STK has a story associated with gameplay, similar to "Crash Team Racing". Story mode is used to unlock tracks and characters for single and multi-player modes. At the beginning of story mode, Gnu, the leader of the free/libre and open-source world, is captured by Nolok, the villain in STK, with his spaceship. Nolok then visits Tux and tells him that he has kidnapped Gnu; unless Tux  and his friends can defeat Nolok, the 'King of the Karts', Gnu would become his supper. After the player defeats Nolok in Fort Magma, the final track of STK, Tux rescues Gnu from his prison. History. "SuperTuxKart" is based on "TuxKart", a project initiated by Steve Baker in April 2000. Due to internal disagreements in the TuxKart project, development stalled. The project ultimately collapsed and was abandoned in March 2004. The project was forked as "SuperTuxKart", but remained in an unplayable and unmaintained state. In 2006 Joerg "Hiker" Henrichs resurrected the project and, with the help of Eduardo "Coz" Hernandez  Munoz, released the game in a playable state. In 2008, Marianne Gagnon (aka. "Auria") joined the project and eventually replaced Coz as one of the project leaders after his retirement. Historically licensed under version 2 of the GPL, in 2008 the game's source code was relicensed to the GPLv3. The game's assets (textures, models, sounds, music, etc.) are licensed under a mixture of free content and DFSG conforming licenses: GPL, CC BY, CC BY-SA, and Public Domain. In 2010, "SuperTuxKart" switched away from using SDL and PLIB libraries (used through version 0.6.2) for graphics and started using  the Irrlicht Engine. This change was released in version 0.7. In 2013 and 2014, the game participated in Google Summer of Code as a mentoring organization. The migration of the code repository from SourceForge to GitHub was officially announced on 17 January 2014, though the assets repository and downloads remain on SourceForge. On April 21, 2015, version 0.9 was released which used a highly modified version of Irrlicht, including an entirely new graphics renderer dubbed Antarctica. This enabled much better graphics with features such as dynamic lighting, ambient occlusion, depth of field, real-time shadow mapping, and more. In early  2018, Antarctica switched to using PBR in the git version of the game. Antarctica Rendering Engine uses OpenGL 3.3+ (or OpenGL ES on suitable platforms) and GLSL for most of the graphical work. In March 2017, "SuperTuxKart" was greenlit on digital distributor Steam.. However, , "SuperTuxKart" is not yet downloadable on Steam. In May 2019, Joerg "Hiker" Henrichs stepped down as a lead developer of "SuperTuxkart", with "Benau" and "Alayan" taking over as the new project leaders. Reception. In 2004, TuxKart was selected by The Linux Game Tome to be their "Game of the Month" project. In 2007 "Full Circle  Magazine" named "SuperTuxKart" as one of the top five racing games available for Linux, describing it as the game to try if you're "tired of realistic driving". "Linux Journal" also praised the game, saying that "the courses in SuperTuxKart are fun, colorful and imaginative" and that "If you've played the original, you'll be impressed by the new, hugely improved, SuperTuxKart." Although it did not make it into the "APC Mag" top five free games, it received an honorable mention in 2008. In 2009, TechRadar cited it as one of the best games to put on a Linux  netbook. In 2016, OMG! Ubuntu! called SuperTuxKart "the best kart racing game to not feature Mario, Toad or Diddy Kong". Since August 2007 SuperTuxKart has been downloaded over 3.2 million times from SourceForge.net and has over 100 thousand downloads on the Google Play store.