Question: The video game developer who hosts The Mid-Season Invitational was established in what year?

Context articles: Mid-Season Invitational
IL-2 Sturmovik (series)
Riot Games
Silicon Studio
2017 Mid-Season Invitational
Alex Seropian
List of Square Enix compilation albums
Game Republic
Ruffian Games
Video game developer

The Mid-Season Invitational (MSI) is an annual "League of Legends" tournament hosted by publisher Riot Games since 2015.
 It is the second most important international "League of Legends" tournament aside from the World Championship.
 The event features the Spring Split champions of the five major competitive "League of Legends" regional leagues, as well as a wildcard team from a lesser region determined by the International Wildcard Invitational, held a few weeks beforehand.
 In its inaugural tournament, Chinese team EDward Gaming emerged victorious by defeating Korean team SK Telecom T1 3–2 in the final.
IL-2 Sturmovik (Russian: Ил-2 Штурмовик ) is a series of World War II combat flight simulator video games originally created by the Russian video game developer Maddox Games under the brand name , following its association with 1C Company.
 After the 2011 release of one of the titles in the series, "", Maddox Games left 1C Company.
 As of December 2012, 1C's new developer is the brand name 1C Game Studios, formed after association with video game developer 777 Studios, mostly known for developing and releasing the 2009 "" simulator.
 The first game resulting of this collaboration, and the latest title in the "IL-2 Sturmovik" series, is "", released in November 2013.
 Along with its sequels, "IL-2 Sturmovik" is considered one of the leading World War II flight simulators.
Riot Games is an American video game developer, publisher, and eSports tournament organizer established in 2006.
 Their main office is based in West Los Angeles, California.
 They currently have additional offices located in Berlin, Dublin, Hong Kong, Istanbul, Mexico City, Moscow, New York City, St. Louis, Santiago, São Paulo, Seoul, Shanghai, Singapore, Sydney, Taipei, and Tokyo.
Silicon Studio is a Japanese computer graphics technology company and video game developer based in Tokyo.
 As a technology company, Silicon Studio has produced several products in the 3D computer graphics field, including middleware software, such as a post-processing visual effects library called YEBIS, as well as general real-time graphics engines and game development engines, such as OROCHI and Mizuchi, a physically based rendering engine.
 As a video game developer, Silicon Studio has worked on different titles for several gaming platforms, most notably, the action-adventure game "3D Dot Game Heroes" on the PlayStation 3, the role-playing video game "Bravely Default" on the Nintendo 3DS, and "Fantasica" on the iOS and Android mobile platforms.
The 2017 Mid-Season Invitational was a tournament for the multiplayer online battle arena video game "League of Legends" that started on April 28, 2017, and will end on May 21, 2017 in Rio de Janeiro, Brazil.
 Each of 13 premier League of Legends leagues had a team represent them; Europe (EU LCS), South Korea (LCK), and China (LPL) had their teams automatically admitted into the main event whereas the other 10 leagues competed among each other in a "play-in" with the top 3 teams advancing to join the main event.
 The six teams that competed in the main event were Team Solomid of NA LCS, Gigabyte Marines of GPL, Flash Wolves of LMS, G2 eSports of EU LCS, SK Telecom T1 of LCK, and Team WE of LPL.
Alexander Seropian (born 1969) is an American video game developer, one of the initial founders and later president of Bungie Software Products Corporation, the developer of the "Marathon", "Myth", and "Halo" video game series.
 Seropian became interested in computer programming in college and teamed up with fellow student Jason Jones to publish Jones's game "".
 The two became partners, and Bungie grew to become the best-known Apple Macintosh game developer before being bought by Microsoft in 2001.
Square Enix is a Japanese video game developer and publisher formed from the merger on April 1, 2003 of video game developer Square and publisher Enix.
 The company is best known for its role-playing video game franchises, which include the "Final Fantasy" series, the "Dragon Quest" series, and the action-RPG "Kingdom Hearts" series.
 For many of its games, Square Enix has produced albums of music containing songs from those games or arrangements of those songs.
 In addition to those albums, it has produced several compilation albums containing music from multiple games or series made by the company.
 These albums include music directly from the games, as well as arrangements covering a variety of styles, such as orchestral, piano, vocal, and techno.
 This list includes albums produced by Square, Enix, or Square Enix which contain music from multiple games in the companies' catalog which are not a part of a single series.
 The first of these was "Personal Computer Music" by Enix in 1987.
 Dozens of albums have been published since, primarily through Square Enix's own record label.
Game Republic Inc. (株式会社ゲームリパブリック "Kabushiki-gaisha Gēmu-Ripaburikku" ) was an independent video game developer based in Tokyo, Japan.
 The company, which employed just under 300 individuals before its closure, was founded on July 1, 2003 by Yoshiki Okamoto after he departed from Japanese game developer and publisher Capcom.
 He began working at rival game developer and publisher Konami in the 1980s, and was responsible for such arcade games as "Gyruss" and "Time Pilot".
 He then moved to Capcom, where he worked on many franchises, such as "1942", "Resident Evil" and especially "Street Fighter II".
Ruffian Games is a British video game developer founded in 2008.
 The developer was formed by two members, Billy Thomson and Gaz Liddon, of the video game developer Realtime Worlds.
 Ruffian Games originally consisted of members from Realtime Worlds and Xen Studios, among others.
 They have made "Crackdown 2", the sequel to the 2007 video game, "Crackdown".
A video game developer is a software developer that specializes in video game development – the process and related disciplines of creating video games.
 A game developer can range from one person who undertakes all tasks to a large business with employee responsibilities split between individual disciplines, such as programming, design, art, testing, etc.
 Most game development companies have video game publisher financial and usually marketing support.
 Self-funded developers are known as independent or indie developers and usually make indie games.