The Idolmaster: Cinderella Girls

VS

Foxhole

The Idolmaster: Cinderella Girls is a long-running mobile/social idol management game launched in 2011. It remains notable in Japan with an active niche fanbase, regular events, and ties to the broader Idolmaster brand, but is well past its peak popularity. Its daily active players are likely in the tens of thousands, supported by ongoing in-game events, but fallen off from earlier years. Not an MMO, as it lacks persistent world and massive real-time multiplayer interactions.

Foxhole is a persistent online war game (released in 2017) developed and published by Siege Camp. The game is noted for its MMO-styled open world, where hundreds of players interact and cooperate in large-scale warfare over days or weeks. While not a mainstream title, it has an active, passionate community and niche appeal. Player numbers tend to be stable for a dedicated audience, typically in the high thousands per day based on previous Steam chart data and ongoing community activity.