A role-playing-game is a game in which players assume the roles of characters in a fictional setting. The fantasy war games in the 1970s gave a rise to the modern role-playing-game. This genre of the game popularly provides a gist of action and a sense of adventure and accomplishment to a player. Therefore, this project is carried out to develop a 3D game that has an open-world level design to provide an immersive experience for the players. In addition to that, the gameplay is very simple and easy to get used to. The game is designed using Unity game engine. Unity is a synthesizing type of game engine that the designers could use to develop a videogame, visualized constructions and real-time 3D animations. Furthermore, it is a cross-platform engine that supports multiple operating systems like Windows, Linux, Mac, iOS, Android, etc. It provides an interface for controlling the game assets with scripting. It provides a standard set of libraries for game development and allows scripting in C# language. The project aims to develop a 3D action combat game from the top down perspective that focuses on implementing rigid body physics, movement mechanics, lighting, etc. The project demonstrates the basic features of the Role Playing Game genre of games and the process of 3D game development.