The Elder Scrolls Online is an example of successful models that enjoy a sustainable and growing fan base at a steady pace. The game has crossed the 21 million player mark in July of last year, and today it was announced that it has crossed the 22 million player barrier, meaning that the number of its players has increased by more than a million players in less than one year.
The game was released in 2014 and since then it has received updates and expansions routinely since then, which contributed to the growth and sustainability of its fan base. The game is available on PC and Microsoft and Sony home devices.