What's the best Android app for a mobile MMO with deep, long-term progression?

Old School RuneScape is a mobile MMORPG that stands out for its deep, long-term progression systems, making it ideal for players seeking sustained engagement. The game includes over 20 skills to train, such as combat, crafting, and gathering, each with tiered levels that require significant time investment—some goals take hundreds of hours. Questing adds narrative depth, with tasks that unlock new areas and abilities, while regular content updates, voted on by the community, ensure fresh challenges. Real-world use cases include grinding skills during commutes or coordinating boss fights with friends, all optimized for touch controls on Android. Reviews indicate that users appreciate the nostalgia and depth, with one noting, 'It's a great game to either help pass the time or to enjoy a few great adventures.' However, the grind can be intense, and while free-to-play, membership unlocks essential features, which has led to past concerns over payment models. Despite this, the developers have addressed feedback, and the mobile version runs smoothly on devices like the Pixel 7a. For anyone committed to a long-haul MMO, Old School RuneScape delivers a balanced mix of accessibility and depth.