Albion Online is a 'sandbox' style MMO where you pretty much do whatever you please, and it's proving to be quite popular with a healthy growth in players.
In early May of this year, the team at Sandbox Interactive mentioned how the player-count was continuing to rise with a it seeing a large jump in regularly players from March onwards. As of the latest update to how they're doing, things are looking really good for Albion Online. The post mentions how the population growth has continued, with a new peak 'Daily Average User count' of over 125,000 players.
What's interesting is it seems most of this growth is outside of Steam, as there they only see around 13,000 peak player count each day. However, looking over the charts it's clear they're even having something of a huge rebound surge in players on Steam too.
Sandbox Interactive mentioned they're continuing with new features and updates, with more map expansions to come yet and plans to deepen the gameplay experience. They also mentioned official mobile launches are upcoming, and since Albion is fully cross-platform, it's only going to bring in even more players. This is especially good news since it's one of the new MMO's that's not only popular but actually supports Linux too.