Game industry has been growing rapidly due to the development of computer and IT technologies. Especially, computer game is known as the core of multimedia and hi-tech entertainment. Recently, computer game has been evolving into 3D RPG and simulation types which give players more realism from the existing 2D RPG ones. In this paper, we design and implement a full 3D on-line RPG game content. The game supports simultaneous connections of multi-users on each game server.