GAMES 2020, the 6th World Congress of the Game Theory Society, will be held at Budapest Congress & World Trade Center from 19 to 23 July 2021. Game Theory focusses on models of conflict, competition and cooperation, in which the different parties focus on their own individual aims. GAMES 2020 will be co-located with EC’21, the 22nd ACM Conference on Economics and Computation. GAMES 2020 will be held in a hybrid set-up with the first two days on-site and the remaining three days via „Virtual Chair” – an on-line meeting platform.