The milestone was reached as RuneScape celebrates its 25th anniversary.
Open world MMORPG RuneScape, alongside Old School RuneScape, have generated over $3 billion in lifetime revenue.
UK game industry trade body UK Interactive Entertainment shared the news of developer Jagex's milestone. The Cambridge-based studio now employs over 600 people, and is currently celebrating 25 years since the series' origins.
"It's incredible to think a quarter century has passed since RuneScape's beginnings as a Java-based browser game," Jagex CEO Jon Bellamy said in the announcement. "Today we're speaking to the largest and most active RuneScape community in our history, and this milestone is as much theirs as it is ours."
"The government is committed to ensuring the continued success of our world-class video game sector and I am excited to see how Jagex continues to innovate, inspire, and build worlds alongside its global community," creative industries minister Ian Murray said.
Last week, Jagex announced RS25, a celebration event commemorating the anniversary with a series of livestreams and updates about Runescape, Old School Runescape, and Runescape Dragonwilds, all slated to run in January.
RuneScape celebrations arrive on the back of layoffs and Pride rollbacks
In June 2025, Jagex laid off an undisclosed number of staff from 'non-game development roles.' The decision was presented as "changes to our operational structure," according to Jagex, and were part of a strategy to build "the best experiences for players and grow the Runescape community."
While Jagex declined to disclose the exact number of employees affected at the time, it said the vast majority are within the operations and administrative support teams.
That same month, Jagex was accused of "catering to American conservatism" after purportedly scaling back support for Pride Month events in 2025. During an interview in September 2025, Bellamy said the decision to downscale support for Pride Month-related content was made to avoid a "backlash," as the event had become "controversial in a way it didn't use to be."
At the time, Bellamy added that, ultimately, his job is "governance and protection as much as anything else," and that "these kinds of harsh decisions" have to be made to protect the imminent future of the game.
"If there are tough decisions to be made next year, we'll make them. If the world has changed a bit and the environment is different, we will react accordingly," he added.
Correction: This article was updated to reflect that Runescape has earned $3 billion in lifetime revenue, not $4 billion as previously stated.