Cloud9 has had a mixed relationship with Dota 2.
The organization first entered the game in 2014 by signing the roster of Speed Gaming.int. The acquisition was a turnkey operation for Cloud9, as the Speed Gaming.int roster was already established as one of the best in the west courtesy of a first-place finish at the MLG Championship Columbus and a second-place finish at the inaugural Dota 2 Champions League.
The team remained solid after being signed and received a direct invitation to The International 2014 as a result. The squad performed fairly well at the event, finishing in the top six.
The team remained largely intact following the event, but was shaken up heavily in early 2015 by the additions of Johan "BigDaddyN0tail" Sundstein and Rasmus "MISERY" Filipsen. These players, alongside Jacky "EternaLEnVy" Mao, Adrian "Fata" Trinks, and Pittner "bOne7" Armand, comprised one of the most star-studded rosters in Dota 2 at the time.
The team enjoyed solid success in a number of tournaments from there, but never placed higher than second. Their performance still warranted a direct invitation to The International 2015. Unfortunately, the team was swiftly defeated after losing to eventual grand finalist CDEC Gaming in the upper bracket and to Vici Gaming in the lower bracket.
The entirety of the roster was released in the weeks following TI5, but Cloud9 quickly signed a new roster and returned to North America. This new lineup wouldn’t last long, however.
Following Cloud9’s qualification for the 2016 Frankfurt Major, the new roster became embroiled in controversy when former player EternaLEnVy publicly accused new carry player Ravindu "Ritsu" Kodippili of leaking scrim information on North American team Digital Chaos to other players in the region. The backlash was swift and had an impact on the team’s performance. The team released Ritsu just three months after signing him and cut the remainder of the roster two weeks later.
Cloud9 stayed out of Dota 2 for the entirety of 2016, but returned to the game in early 2017 by signing the former roster of The Imperial. The team disbanded four months later, but Cloud9 would return to Dota 2 again later in the year by sponsoring EternaLEnVy’s Team NP after that side had qualified for The International 2017. The reunion was short-lived as the team dissolved after being among the first elimination from the tournament.
This saw Cloud9 withdraw from the game entirely for over two years. In 2020, Cloud9 sponsored a new international roster led by MISERY. The team initially competed in southeast Asia, but quickly saw players from the region benched in favor of returning veterans EternaLEnVy and Johan "pieliedie" Åström.