September 2025 was an electric month in the world of esports, marked by two of the biggest annual global championships: The International (Dota 2) and VALORANT Champions. These tournaments, alongside key regional finals, reshaped the competitive landscape and put several organizations under the global spotlight.
While consistent performance across multiple titles defines the “best” team over a long period, looking solely at September’s biggest moments, here are the teams that truly dominated the headlines.
The Standout Champions of September 2025
1. Team Falcons (Dota 2 Champions)
Team Falcons solidified their reputation as a multi-game powerhouse by clinching the biggest prize in Dota 2: The International 2025. Their dramatic victory in the Grand Finals, overcoming a tough challenge from Xtreme Gaming, earned them the coveted Aegis of Champions and a massive winner’s share of the prize pool. Their performance at TI was a masterclass in strategic execution, positioning them as one of the most successful organizations of the year.
- Key Achievement: Winners of The International 2025.
2. NRG (VALORANT Champions)
In the competitive shooter scene, North American giant NRG secured the ultimate title by becoming the champions of VALORANT Champions 2025 in Paris. Their run through the demanding tournament bracket was highlighted by clutch plays and tactical brilliance, culminating in a thrilling Grand Final victory over Fnatic. This win cemented their roster as the best VALORANT team in the world for the 2025 circuit.
- Key Achievement: Winners of VALORANT Champions 2025.
Teams That Drove Viewership and Momentum
While tournament wins often dictate rankings, viewership and consistent performance in major regional leagues are just as crucial.
| Team | Game | September Highlight |
| Xtreme Gaming | Dota 2 | Grand Finalists at The International 2025. Their deep run generated immense viewership and placed them as the most-watched esports team of the month by total hours viewed, a testament to the popularity of the event. |
| Gen.G Esports | League of Legends | Winners of the LCK 2025 Season. Their victory in the Korean league’s marquee derby against T1 set viewership records, reaffirming their status as the dominant force in the LCK region heading into Worlds 2025. |
| G2 Esports | Counter-Strike 2 | Champions of the BLAST Open Fall 2025. G2 staged an impressive comeback in the Counter-Strike scene by defeating Team Vitality in the final, ending a significant trophy drought and confirming their roster changes had paid off. |
| ONIC Esports | Mobile Legends: Bang Bang | Dominant performance in MPL Indonesia Season 16. Their winning streak and high-stakes matches against rivals like RRQ Hoshi propelled the league to massive viewership peaks, making them the most-discussed team in Southeast Asian mobile esports. |
September 2025 was truly a month of championship moments. Whether it was the financial glory of Dota 2’s TI, the shooter crown of VALORANT Champions, or the continuous regional supremacy in LoL and MLBB, these teams proved that when the biggest stages are set, the world’s best step up.