Age of Empires Online: Celeste Fan Project

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Persona 5: The Phantom X

Age of Empires Online: Celeste Fan Project is a fan-run revival of the original Age of Empires Online, which was discontinued by Microsoft. As a community project launched in 2017, it maintains a niche but active RTS player base, mostly composed of dedicated fans. While not as popular as mainstream RTS games, its weekend activity peaks and ongoing support likely keep daily active players in the low thousands range. It is not run by major publishers but has support from a dedicated fan community.

Persona 5: The Phantom X is a recently released (April 2024) mobile/PC RPG with strong backing from notable publishers like Sega, Atlus, and Perfect World Games. Its association with the well-known Persona franchise and release across mobile platforms suggest a moderate but sizable player base, especially in Asia. However, it is not marketed as an MMO—it's primarily a single-player turn-based RPG with limited multiplayer features, so it doesn't fit MMO criteria.