Genshin Impact

Genshin Impact redefined mobile gaming by delivering a full open-world action RPG with exploration quality rivaling Breath of the Wild, all for free. It generated $4 billion in its first two years, outperforming #6 Clash Royale by nearly double that period's revenue, while maintaining a staggering content pipeline with new regions, characters, and storylines every six weeks. The gacha monetization is aggressive, but the base game offers hundreds of hours without spending a dime, making it a benchmark for mobile free-to-play value.