Ubisoft Mainz was established as Related Designs by Thomas Pottkämper, Burkhard Ratheiser, Thomas Stein, and Jens Vielhaben in 1995, then based in Pottkämper’s parents’ house in Mainz’ Nackenheim district. On 11 April 2007, Ubisoft acquired a 30% stake in Related Designs, alongside the rights to the Related Designs-developed Anno series. In May 2008, they had 50 employees. On 11 April 2013, Ubisoft acquired the remaining 70% and took total control over Related Designs. From that point on, the company would develop projects in tandem with another German Ubisoft studio, Blue Byte. Related Designs was assigned the Blue Byte name in June 2014. The studio was rebranded Ubisoft Mainz in August 2019. The studio has 170 employees as of January 2023.

Reference: Wikipedia