Cooperation Under Resources Pressure (CURP) is an agent-based model designed to explore the evolution of cooperation under different resources scenarios that condition individual needs for survival. The model is a very stylized abstraction, where resources pressure is modeled by a stochastic process of acquiring resources (i.e. prob-resource) and by a parameter of the minimal proportion of the resource unit necessary for survival (i.e. min-energy). The model offers different insights about how the resources pressure can change the cooperative behavior of any group of individuals, although we have a particular interest in the evolution of sharing practices in HG societies.