Seven Knights Re:BIRTH: How a 2014 Hero Collector Came Back as Korea's Fastest Riser
Netmarble shut down the original's global service, rebuilt the game in Unreal Engine 5 and launched it at home first. In the first half of 2025 nothing in Korea grew faster.
In March 2023, Netmarble did something that looked like an ending. It announced that the global service of Seven Knights, one of its oldest hits, would close. In the same breath it revealed what came next: a full rebuild called Seven Knights Re:BIRTH.
Two years later the gamble paid off. Seven Knights Re:BIRTH launched in Korea on May 15, 2025, and in Sensor Tower's ranking for the first half of 2025 it was No. 1 in revenue growth, No. 3 in downloads and No. 4 in overall revenue among mobile games in Korea, after only about six weeks on sale. Netmarble then brought it to the rest of the world in September 2025.
The original
To understand why Koreans cared, go back to March 2014. Seven Knights, developed by Netmarble Nexus, was a hero-collecting RPG: you gathered characters with distinctive art and skills, built teams and fought turn-based battles that were fast enough to play on a bus. It became one of the defining Korean mobile games of the mid-2010s, before MMORPGs took over the charts, and went worldwide in the following years.
A sequel, Seven Knights 2, arrived in November 2020 on Unreal Engine 4, with a PC version following in 2021. But the original seven knights, and the art style fans remembered, belonged to the first game.
What Re:BIRTH changes
Re:BIRTH is not a simple remaster. Netmarble Nexus rebuilt the game in Unreal Engine 5, bringing the classic heroes into a modern 3D look built around the hero collecting and team building that made the original popular. It runs on Android, iOS and Windows PC, so players can switch between phone and computer.
The release plan was also unusual. Netmarble had originally aimed for a global launch in the first half of 2025, but chose to launch in South Korea only on May 15, 2025 and expand later. That let the team tune the game for its home audience, where the Seven Knights name was strongest, before taking it abroad.
The numbers
Sensor Tower's first-half 2025 review for Korea put Seven Knights Re:BIRTH in some heavy company:
- No. 4 in revenue, behind only Lineage M, Whiteout Survival and Last War: Survival
- No. 3 in downloads
- No. 1 in revenue growth, ahead of Mabinogi Mobile
By the end of September 2025, Sensor Tower estimated it had earned about $120 million in Korea since its May launch, which made it the most successful new mobile release of the year in the country at that point.
It also lifted Netmarble. The publisher climbed from 4th to 2nd in Korea's mobile revenue ranking for the half, with revenue growing about 1.5 times year on year, driven by Seven Knights Re:BIRTH and RF Online Next.
Why it matters
Re:BIRTH is a lesson in how to treat an old IP. Netmarble could have kept the original running with ever-smaller updates. Instead it closed it, rebuilt it properly and relaunched it as an event. That approach worked because Korean players had real affection for the original heroes, the same nostalgia that powered Mabinogi Mobile and MapleStory: Idle RPG in 2025.
WGC's take: Korea's mobile market in 2025 rewarded familiar names done well. Seven Knights Re:BIRTH shows that a 2014 game can still feel new if you are willing to start again rather than patch forever. Watch whether its global version can repeat that success outside Korea, where the Seven Knights name carries less nostalgia.