Second Life™ is a 3D virtual world with unlimited potential as a tool for cognitive modeling. This paper discusses the many advantages of using Second Life versus other simulation environments, the aspects of cognitive modeling that this simulation environment may be appropriate for, the interface setup, and various technical issues. Two simulations are provided as examples of interfacing Second Life with cognitive models, including an example where the high-fidelity complexity and constraints of Second Life may help to distinguish between models and/or parameter values that produce varying performance in different task environments.