An agent is an autonomous entity that perceives its environments, and upon that input, responded with actions accordingly. A common trend in developing agent is through object - oriented programming (OOP). This study explores the possibility of developing agent with a game engine, namely Unity3D, which can navigate within a partially observable environment, with the purpose to enhance t he simulation of real - world situation, i.e. egress simulation. Testing and simulation of the model proves that the agent is capable enough to navigate such environment explicitly. This paper describes the development and the mechanism of the simulation model.