A prototype serious game is being developed using Unreal® Engine 4 (UE4) within an R&D project proposed by an energy utility company. In this" point-and-click" serious game, the main goal is to perform the replacement of a damaged pedestal-type insulator in a power substation. As a conceptual basis, the theory of learning proposed by Robert Gagné was used. Gagne proposes a nine-step process that details each element required for an effective learning and provides educators with a checklist to use before and during the training activities. As each step is accomplished, learners are more engaged and retains more skills and information. Gagnés model has been widely accepted as a means to better manage learning and training processes. This work describes an application of Gagnés model to a serious game which aims at providing electricians with a more effective learning tool, focusing on knowledge, skills, attitudes and decision-making during a very risky activity.