TIMETRAVEL.BERLIN (TTB) creates, operates and licenses the most authentic and historically engaging VR time travel experiences, both location based, mobile and online. All TTB experiences are to offer the highest possible degree of authenticity, immersion, compelling entertainment and profound knowledge transfer. Featuring the latest comprehensive real-time VR and AI technology, TTB aims to create the world's most immersive virtual city simulation in Berlin and thus make extended and authentic time travel possible Currently TTB is working on 20s.BERLIN, a state-of-the-art virtual reality simulation of the German capital of the legendary 1920s. In 2020, the project, which is supported by the Medienboard Berlin-Brandenburg, received a MegaGrant from Unreal Engine developer Epic Games. 20s.BERLIN, the world's first freely accessible city simulation of the European metropolis of this era, is interactive and reactive and takes users on a journey right into the heart of the historic original: to Pariser Platz, right next to the Brandenburg Gate. From 2 October 2021, TTB presents its VR experience to the general public at Berlin's EAST SIDE MALL.