League of Legends World Champion Lauri 'Cyanide' Happonen Dies at 31

Former League of Legends world champion Lauri 'Cyanide' Happonen, a Finnish esports player, has died at the age of 31. He died on July 31, 2026, according to the Finnish newspaper Ilta-Sanomat, which reported his death on October 26, 2026. Ilta-Sanomat said his death was confirmed by Finland's Digital and Population Data Services Agency. His cause of death has not been disclosed.

The dates matter in this report. Happonen did not die this week. He died on July 31, and the news became public almost three months later, on October 26, when Ilta-Sanomat reported it and the esports team Fnatic posted a statement about his passing.

The youngest player to win Worlds

Happonen won the inaugural League of Legends World Championship with Fnatic in 2011 at the age of 16. That made him the youngest player ever to win Worlds. He played as Fnatic's jungler, the role that moves around the map and sets up fights for the team.

He also won three European league titles with Fnatic between 2013 and 2014. Fnatic summed up that part of his career in its statement on October 26. The team said: "We are deeply saddened to learn of the passing of Lauri 'Cyanide' Happonen earlier this year. During his four-year spell at Fnatic, Cyanide made history as the youngest ever player to win Worlds at just 16. He leaves behind a legacy that will never be forgotten."

From Fnatic to Origen

After his years at Fnatic, Happonen joined Origen alongside his former teammate xPeke. With Origen, he reached the semifinals of the 2015 World Championship. That run gave him deep Worlds results with two different teams, first as a champion with Fnatic in 2011 and then as a semifinalist with Origen in 2015.

His career sits at the start of the game's professional history. The 2011 title was the first World Championship in League of Legends, and Happonen won it as a teenager. The three European titles that followed in 2013 and 2014 showed that the early win was not his only result at the top level in Europe.

A showmatch six days before his death

On July 25, 2026, six days before his death, Happonen took part in a League of Legends classic showmatch in France. He reunited there with former teammates, including Bora 'YellOwStaR' Kim.

YellOwStaR posted a tribute on October 26. He wrote: "Lauri was so much more than a teammate. He was one of the kindest, most genuine souls I've ever had the privilege of knowing."

Tributes and a second loss from the 2011 team

Fnatic posted its statement on October 26, saying it was deeply saddened by Happonen's passing earlier this year. League of Legends Worlds 2026 opened with a tribute to him, according to GameDaily.

Happonen is the second member of Fnatic's 2011 championship winning roster to die. Maciej 'Shushei' Ratuszniak died in April 2025 at the age of 36.

No cause of death for Happonen has been disclosed in the reports cited for this article, and this article does not speculate about one. The confirmed facts are his death on July 31 at the age of 31, the confirmation reported by Ilta-Sanomat, the public reporting on October 26, and the tributes that followed from Fnatic and from his former teammates.