Question: Who developed the game on which Feral Interactive publishes its ports? 
Context: Sid Meier's Railroads!  is a business simulation game developed by Sid Meier on the Gamebryo game engine that was released in October 2006 and is the sequel to "Railroad Tycoon 3".  Although Sid Meier created the original "Railroad Tycoon", subsequent versions were developed by PopTop Software.  After a visit to Miniatur Wunderland in Hamburg, Germany, Sid Meier was inspired to reinvent his original creation.  A version for the Mac OS X was published by Feral Interactive on November 1, 2012, under the latter's Feral Legends label. Sega Superstars Tennis is a tennis video game developed by Sumo Digital and published by Sega.  The game was released in 2008, and includes sixteen playable characters and ten courts from various Sega franchises.  In total, fifteen Sega franchises are represented in the game.  Along with Sonic & Sega All-Stars Racing, it was announced that SEGA Superstars Tennis would be ported to Mac OS X by Feral Interactive.  The Mac OS X version of the game was released by Feral Interactive on October 17, 2013. Mini Ninjas is a 2009 action-adventure game developed by IO Interactive and published by Eidos Interactive for Microsoft Windows, Nintendo DS, PlayStation 3, Wii and Xbox 360.  A Mac OS X version of the game was released on July 8, 2010, by Feral Interactive.  In December 2011, it was announced that the game will be also made available as a browser game for Google Chrome. Paradox Interactive is a Swedish video game publisher based in Stockholm.  The company is best known for releasing historical strategy computer games.  Paradox Interactive publishes its own games, both developed by their division, Paradox Development Studio, and those of other developers.  It was formerly a division of Paradox Entertainment, rights holders of properties such as the Robert E. Howard character Conan. Hitman is an episodic stealth video game developed by IO Interactive and published by Square Enix for Microsoft Windows, PlayStation 4, and Xbox One.  A port for Linux, developed and published by Feral Interactive, was released on 16 February 2017.  A version for macOS, also developed and published by Feral Interactive, was released on 20 June 2017.  It is the sixth entry in the "Hitman" series.  The game's prologue acts as a prequel to "", while the main game takes place seven years after the events of "". Total War is a computer series of strategy games developed by The Creative Assembly.  These combine turn-based strategy and resource management, with real-time tactical control of battles.  The first of the series, "" was released in June 2000.  The most recent major game released was "" on 24 May 2016.  The series has sold over 20 million copies. Empire: Total War is a turn-based strategy and real-time tactics computer game developed by Creative Assembly and published by Sega.  The fifth installment in the "Total War" series, the game was released in 2009.  The game, which focuses on the early modern period of the 18th century, was announced at the Leipzig Games Convention in August 2007.  The Mac OS X version of the game was released by Feral Interactive on 10 June 2014.  The Linux version was released, also by Feral Interactive, on 8 December 2014. Max Payne is a third-person shooter video game developed by Remedy Entertainment and published by Gathering of Developers in July 2001 for Microsoft Windows.  Ports created later in the year for the PlayStation 2, Xbox and the Game Boy Advance were published by Rockstar Games.  A Mac OS port was published on 16 July 2002 by MacSoft in North America and Feral Interactive in the rest of the world.  There were plans for a Dreamcast version of "Max Payne", but they were canceled due to the discontinuation of the console.  The game was re-released on 27 April 2009 as a downloadable game in the Xbox Originals program for the Xbox 360.  The game was also re-released in the spring of 2012 as a downloadable game in the PlayStation Store for the PlayStation 3 under the PS2 classics banner, iOS, Android, and in April 2016 for the PlayStation 4 as a PS2 emulated downloadable game in the PlayStation Store. Feral Interactive is a video games publisher for macOS and Linux platforms.  It was founded in 1996 and is based in London, UK.  Feral Interactive works with publishers such as Square Enix, 2K Games, Sega, Warner Bros.  Interactive Entertainment and Codemasters.  Feral develops and publishes ports of its partners' popular games including the "Total War" series, "", "Tomb Raider" and "". YNK Interactive is a game publisher company founded in 2005 based in Orange County, California.  A wholly owned subsidiary of YNK Korea, a Korea online game developer and publisher.  YNK Interactive publishes English versions of game titles from YNK Korea that released titles such as Seal Online, Rohan Online, and .
Answer: The Creative Assembly