This document describes an ERP simulation game called ERPsim that is used to teach enterprise resource planning (ERP) concepts. ERPsim simulates managing a fashion distribution business over multiple rounds and weeks using a real ERP system. Students make business decisions like ordering inventory, setting prices, and managing costs and cash flow. The goal is to be profitable and pay down debt. ERPsim has been used by over 225 universities worldwide to train over 22,000 students on ERP systems.