September 30, 2025 - GameSir, a global innovator in gaming peripherals, is thrilled to announce an official partnership with renowned US esports organization Complexity. Through this collaboration, the GameSir G7 Pro has been selected as the team’s official controller, supporting Complexity in upcoming battles.

Founded in 2003, Complexity has been a powerhouse on the global esports stage, competing at the highest levels with outstanding skill and professionalism. Partnering with Complexity marks a new chapter for GameSir, reinforcing the company’s commitment to delivering professional-grade equipment that empowers players to perform at their peak.

Fans will soon have the chance to see Complexity compete with the G7 Pro in action at two major upcoming tournaments:

• HCS Charlotte Major 2025 | October 3-5
• HCS World Championship 2025 | October 24-26

All matches will be streamed live on official HCS channels including the official Halo Twitch channel. Don’t miss the chance to cheer for Complexity as they compete for championship glory.

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About Complexity

Complexity is one of North America’s longest-standing esports organizations. Complexity’s esports teams have won more than 140 championships in nearly 30 game titles over its 20+ year history. Staunchly committed to professionalism and a player-first mentality, Complexity has been continuously recognized as a global leader in modern esports. For more information on Complexity, visit www.Complexity.gg. 

About GameSir

Founded in 2013, GameSir is one of the world’s leading providers of high-performance gaming peripherals, providing high-tech gaming hardware and excellent gaming experience for every gamer. Known as “The Anti Stick-Drift Experts”, we innovate with TMR and Hall Effect sticks to deliver top-tier performance. Trusted by millions of gamers, GameSir enhances every experience through bold design, quality engineering, and reliability. For more information on GameSir, visit www.gamesir.com.