There is currently a huge debate in Germany about Islam - the second-largest religion after Christianity. The image of both religions is burdened by prejudices and half-truths that make our coexistence and acculturation more difficult. In the age of tachogenic world alienation, we are increasingly dependent on having to believe other people' s knowledge and experiences. Fake news, stereotypes and an alternating economy of extremes blur truth and lies into something semi-fictitious. The game What do you believe? is intended to offer an alternative approach and a playful framework for interreligious discourse between Muslims and Christians. Participants are confronted with questions that ask them to think about prejudices, values and worldviews. It is an experimental attempt to slow down the world, to disillusion illusions, to get to know religions and to meet people.