Hamburg MMO developer and publisher InnoGames now claims to have 50 million players, shared between 200 territories.
"This is really a huge success for us," said founder Hendrik Klindworth. "We put a lot of effort and passion into our games; therefore it is a big motivation that they give pleasure to so many players."
The German firm was formed in 2003 to create hobby project Tribal Wars – a free to play browser game which has accrued 30 million players since launch.
In recent months, InnoGames has begun to move beyond browser titles, picking up an audience of 250,000 for its first Facebook game WestWars within a month.
Now constituting 80 employees and 75 international freelancers, the company has confirmed it intends to recruit around 100 new staff within the next year.
It is also moving into licensed games, and plans to launch localised versions of Japanese client-based MMO Arcadia Saga later this year.