Similar title to Nowak, M.A. & Sigmund, K. (2000). Games on grids. In: The Geometry of Ecological Interactions: Simplifying Spatial Complexity. Eds. Dieckmann, U. ORCID: https://orcid.org/0000-0001-7089-0393, Law, R., & 9, J.A.J. Metz, Cambridge: Cambridge University Press. ISBN 0521022096 10.1017/CBO9780511525537.010.