The development of foresight is a crucial activity for any organisation, especially in times of increasing dynamism and complexity. The aim of this article is to discuss the usefulness of developing foresight in a business wargame. Wargaming, a role-playing simulation of a dynamic situation, has been used mainly by the military, but more recently, it has also been used in the context of competitive intelligence and strategy-testing in organisations. A business wargame typically evolves several years into the future, allowing the participants to 'experience' future dynamics in the organisational environment and, consequently, to develop foresight. This article argues that, because of its participative and dynamic nature, business wargaming can overcome cognitive barriers, challenge mental models, detect weak signals of change in an organisational environment, re-direct attention in an organisation, and assist an organisation in developing foresight.