OntoGame is a project and series of games that aim at weaving the Semantic Web. It was initiated by Katharina Siorpaes and Martin Hepp at the University of Innsbruck. The core idea is that, despite significant advancement in technology and tools, building ontologies, annotating data, and aligning multiple ontologies remain tasks that highly depend on human intelligence, both as a source of domain expertise and for making conceptual choices. This means that people need to contribute time, and sometimes other resources, to this endeavor.