StarCraft, as a professional eSport, had many leagues. The two most widely renowned individual leagues were the OnGameNet Starleague (OSL) and the MBCGame StarCraft League (MSL). Proleague was the premier team based competitive league.
The Starleague (or OSL for short) was the most prestigious individual league in Korea. It was organized and broadcasted by OnGameNet. NaDa, July, Jaedong, and Flash have all won this league thrice, earning them a Golden Mouse.
The last Broodwar Starleague occurred in 2012. The tournament still exists today, but players now compete in Starcraft 2.
The MBCGame StarCraft League (or MSL for short) was the Starleague's younger brother. Although less prestigious, the MSL was still well attended as well as endowed with high-level play. Famous title winners include NaDa (the KPGA Tour) and the Golden Badge holders — iloveoov, sAviOr, Bisu and Flash.
The last MSL occurred in 2011. The disbandment of MBCGame channel on Februrary 1, 2012 signaled the end of the MBCGame StarCraft League.
The GOMTV Classic began in 2008 after the success of the GOM Invitational. The GOMTV Classic catered to the foreign community by broadcasting the tournament online and contracting English caster Nick “Tasteless” Plott. The GOMTV Classic ran for 3 seasons.
The Proleague is a joint venture between MBC, OGN, KeSPA and IEG. It is a tournament where the Professional StarCraft teams compete, and generally lasts an entire year. KeSPA considers it to be the most important competition.
World Cyber Games
The World Cyber Games (WCG) is the largest international tournament. Many countries from around the world have their own preliminaries where they then send a selected amount of players to the World Finals.
The last Brood War WCG occurred in 2010.