Physics game engine, the graphics engine and network engine, artificial intelligence engine, sound engine, isometric engine that is more variety such thoughts. The engine for the convenience of the various parts during manufacture of the game. If there is no engine, it is to use this to be produced by programming a portion corresponding thereto directly, saving time and money. For example, look at some first example I saw a lot of Havok physics engine in the engine is relatively inde For example, depending on the intensity and direction of the character is pushed when the hammer hits the hammer Distance, angle, an engine that can help you easily apply a variety of calculations, such as physical strength. The following is a typical wah, etc. also wrote the Gamebryo graphics engine as. Sikimyeo optimize the graphics engine built object in 2D or 3D image through techniques such as Shader serves to make faster, more glamorous images that appear on the screen. Artificial intelligence engine to assist so that you can easily AI characters Any engine helps but, for example, A * pathfinding algorithm, easy to like Adjust the AI monster any play a role. Thus the role that can help you more easily and quickly to play the game engine is produced. In the paper, we analyze the "Unreal Engine" and "Unity3D" engine.

ABSTRACT
 1. Introduction
 2. Related Research
  2.1 PtoP server architecture
  2.2 Single Server Architecture
  2.3 Multi-Server Architecture
  2.4 Symmetric server architecture
  2.5 Asymmetric server architecture
  2.6 Vertical extension model
  2.7 horizontal scalability model
 4. Analysis of Unreal Engine
 5. Analysis of Unity3D Engine
 6. Conclusion
 References

• Dong-Hoon Lee(Department of Game Engineering, Tongmyong University and Department of Biomedical Engineering, Tongmyong University)
• Jae-Hwan Bae(Department of Game Engineering, Tongmyong University and Department of Biomedical Engineering, Tongmyong University) Correspondence to