Germany, next to Scandinavia, has a great ecosystem and the German games industry is strong overall, hence I represent and work with quite a few well-known German developers! Joking aside – German has some of the world’s most successful game developers and is very strong in mobile, PC & console games, from casual to hardcore.
Zooming in on Berlin – Berlin on itself already has had a very vivid start-up scene for many years and I think that is reminiscent of some of the early gaming companies that started their business in Berlin, such as YAGER, who started their business in 1999 and for example Wooga, who started in 2009 and are now over 200 people.
And then you have the various international organizations that have set up their European offices in Berlin, like Tencent, Riot and so on.