The Idolmaster: Cinderella Girls

VS

PlanetSide 2

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.

PlanetSide 2 is a large-scale MMOFPS released in 2012 by Daybreak Game Company. Its unique, persistent world and battles with hundreds of players make it a niche but enduring title. Active support and a tight community keep player numbers modest but steady, especially considering its age. Estimates put daily active players in the low thousands, largely split across a few servers.