Berlin-based social gaming company wooga, whose “Brain Buddies” now has 2.5million users on Facebook (and it’s still growing by 100,000 a day), just closed a round of investment – terms undisclosed – from Holtzbrinck Ventures. It plans to develop several new games and launch them off the back of the momentum created by Brain Buddies.

Holtzbrinck is a good partner for wooga: they have experience in the social media space and are investors in StudiVZ, Germany’s largest home-grown social network.

The online gaming industry has proven quite resilient to challenging economic conditions. The team at wooga, which was only founded in 2009, have been smart enough to combine online gaming with the explosive growth of social networks, and hence have found investment at a time when many VC firms have slammed the door shut.