“What we’re selling is emotional attachment.”
In short: Johnson Yeh is the founder and CEO of Ambrus Studio and the former head of Riot Games in Asia, where he was known as the Godfather of Esports. He joined Brian Rose in Dubai in January 2025 to explain why he left Riot to build a mobile Web3 game aimed at emerging markets and tied to the fight against climate change.
Johnson described Ambrus as an “immortal” studio, from the Greek meaning of its name, building an ecosystem around its token, E4C, which stands for Earth 4 degrees Celsius. Its first title, E4C Final Salvation, is a free-to-play mobile MOBA designed to bring players from Web2 into Web3 without relying on play-to-earn.
The conversation covers why he chose the Sui blockchain, a market plan that starts in India and moves to the US and Europe in 2026, how skins and community creators can lift revenue per user, the role of esports, and Ludus, a Web3 game publishing platform. Brian notes that Ambrus is a portfolio company of London Real Ventures.
Key takeaways
- Web3 helps a small studio compete. Johnson says community ownership improves virality and lowers customer acquisition cost, which he calls a David-versus-Goliath advantage for a small mobile game studio.
- No play-to-earn. He does not believe in play-to-earn and says the game has to be fun first, with the business model focused on cosmetics rather than power.
- Target the markets nobody serves. Ambrus is starting in India, then South Asia, the Middle East and Africa, where he sees about 3.5 billion people and 2.5 billion phones with few games designed for them.
- Skins sell emotional attachment. Web3 allows verifiably unique, creator-made skins, which he compares to tailor-made clothing.
- Esports as marketing. He says esports gives games a lasting emotional connection and can be a cheaper way to acquire players than paid ads.
- One game, then more. He plans to focus on Final Salvation for the foreseeable future, much as Riot spent years on League of Legends before releasing another title.
- Ludus is the Steam of Web3. The planned publishing platform, built with Mysten Labs, is meant to serve PC, mobile, console and HTML5 games under one account.
Leaving the dream job
Johnson first thought about leaving Riot in 2018 after a lucrative offer from a competitor. After a month of reflection he decided money was not the point. He named three passions: climate change, entrepreneurship and innovation, and building a strong consumer brand from Taiwan, where he grew up.
He learned about blockchain in 2021 and said the more he understood it, the more it looked like something that could change the world. He added that he believes only Bitcoin or another decentralised coin could ever replace the US dollar as a global currency, even if that took 150 years.
Final Salvation and the emerging-market thesis
MOBA stands for multiplayer online battle arena, the genre of Dota and League of Legends. Johnson pushed Riot to make Wild Rift, and he says Final Salvation is a shorter, easier take on the genre for people who have never played on mobile. He argues that mobile MOBAs have not won in the US, Europe, Japan or Korea, so he chose to go where there is little competition.
He told Brian that India launched first, with the rest of South Asia, the Middle East and Africa planned for the second half of 2025. Southeast Asia is lower priority because of a strong incumbent, Mobile Legends. His ambitious goal for the year is 10 million monthly active users.
Why Sui, and how the economics work
Johnson chose Sui about three and a half years ago. He praised the team and said fast transactions matter because gamers do not want to wait. For now only assets such as skins, gems and avatars are on chain, while the game itself runs on centralised servers for performance.
On revenue, he described a formula of lower acquisition cost through virality and higher revenue per user from cosmetics. He gave the example of a skin from a famous player’s first triple kill as something fans would value, comparing it to Michael Jordan’s first made shot.
Esports and the Middle East
Johnson said that about half of League of Legends players stayed active in China because of esports. He described the 2017 World Championship, with a stadium of 45,000 for the final and more than 100 million unique viewers in China alone. He sees the Middle East as a strong region for esports because of long-term investment, and hopes to host a first global tournament there by the end of 2025.
He also discussed Ludus and the hybrid publishing model Ambrus uses, working with local partners such as Nazara in India to handle payments and localisation.
Who is Johnson Yeh?
Johnson Yeh is the founder and CEO of Ambrus Studio and a former CEO of Riot Games in Asia, where he led the League of Legends Pro League in China. Born in Taiwan, he has lived in nearly ten countries and now splits his time between Taipei and Shanghai. He recorded this episode with Brian Rose in Dubai in January 2025.
Frequently asked questions
It is a free-to-play mobile MOBA from Ambrus Studio, built on the Sui blockchain, designed to bring Web2 players into Web3 without play-to-earn mechanics.
Johnson Yeh said E4C stands for Earth 4 degrees Celsius, a reference to the temperature rise projected by 2100 if nothing changes, and the studio's aim to use gaming to raise climate awareness.
He said few studios design games for the roughly 3.5 billion people in emerging markets, and that Web3 improves revenue per user and lowers acquisition cost enough to make them profitable.
Ludus is Ambrus's planned Web3 game publishing platform, built with Mysten Labs, intended to work across PC, mobile, console and HTML5.
Johnson Yeh recorded this interview with Brian Rose in Dubai in January 2025.

