[5] After a series of network issues during the Season 2 World Playoffs that led to several matches being delayed, Riot revealed on October 13, 2012, that a special LAN-based client had been quickly developed, designed for use in tournament environments where the effects of lag and other network issues can be detrimental to the proper organization of an event.

[6] On October 13, 2012, the Taipei Assassins (TPA) of Taiwan triumphed over Azubu Frost of South Korea in the Finals of Season 2 World Championship with a score of 3 to 1, and claimed the $1 million in prize money.

[8] On July 11, 2013, Riot Games announced that the United States Citizenship and Immigration Services recognized League of Legends pro-players as professional athletes and that the P visa application process would be more simplified for them.

[10] Despite these reforms, there have still been a number of visa problems that have occurred for players in the LCS and other LoL tournaments entering the United States.

[11][12] Silversmith Thomas Lyte was asked to craft the winner trophy for the 2014 games, having already created the Season Two World Championship Cup in 2012.

In October 2015, SK Telecom T1 became the first-ever two-time World Champion when they defeated fellow Korean team KOO Tigers with a score of 3 to 1 in the best-of-five finals in Berlin, Germany.

[15][16] SK Telecom T1 repeated their feat in October 2016, defeating fellow Korean team Samsung Galaxy 3–2 in the 2016 World Championship.

[25] The 2020 tournament began on September 25 in China, and the final was held in the Pudong Football Stadium on October 31.

[26] The 2021 tournament was held from October 5 to November 6 in Reykjavík, Iceland, where all games were played offline without a live audience due to the impact of the COVID-19 pandemic.

[28] DRX, the LCK's 4 seed, would have a miraculous run through all stages of the tournament, easily topping their play-in group before winning Group C in a tiebreaker game with LEC side Rogue and proceeding to beat both defending champions Edward Gaming and Gen.G in the knockouts.

The play-in round became mostly a GSL-style double-elimination affair with two qualifying matches to decide who would make the main event, with one of the spots being decided by a Worlds Qualifying Series between the 4th seeds from the LCS and LEC, while the main event converted to a Swiss-system tournament similar to those found in the Counter-Strike Majors.

[30] JD Gaming were heavy favorites to complete the elusive "Golden Road", which is when a team wins both the Spring and Summer splits of their league, plus MSI and Worlds, but were eliminated in the semi-finals.

The Mid-Season Invitational (MSI) is an annual League of Legends tournament hosted by publisher Riot Games since 2015.

The inaugural edition will take place on 10-16 March 2025 at LoL Park in Seoul, South Korea at the conclusion of the first split.

Similarly, the Pacific Championship Series (PCS) in Taiwan/Hong Kong/Macau/Southeast Asia, Vietnam Championship Series (VCS) in Vietnam, Japan League (LJL) in Japan and the Circuit Oceania (LCO) by ESL Australia and Guinevere Capital also sent teams to Worlds but were consolidated into domestic leagues that can promote teams to the LCP; the LCO no longer exists as of 2024.