The document provides an overview of Amsterdams, a mobile game that explores shared histories, homes, and experiences between cities of Amsterdam and Oakland. It discusses using mobile games for education and social mapping of cities by making personal stories and actions memorable through gameplay. Challenges include lack of human exchange without participation and data not being enough for augmentation to be effective. Opportunities lie in collaborative activities that move from place to place and have local meaning as a medium for spontaneous interaction and hyper-local information exchange.

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