Software engineering and applications. 2022. This article is about learning the development process of an ordinary online multiplayer game model and analyzing the complexity of its mobile option by several types of tests using the Unity game engine. In today's era of smartphones, mobile games have become very popular. Video game developers use game engines as tools to handle the complex aspects of game development. Although engines play an important role in the success of games, to our knowledge, they are often developed in isolation, in a closed manner, without architectural discussions, comparison and collaboration between projects. In this, this article elides the game engine architecture and its constituents and illustrates the features and comparative analysis between four popular game engines, namely Unity, GameMaker, Unreal and CryEngine. Nowadays, game engines have become an integral part of the game development environment. Not only, as a case study, artificial intelligence is used as a representative subfield of computer science and implements an active learning environment with a scriptable game engine for students.III. Introductory computer. Science involves developing, analyzing and applying algorithms. Effective solutions to important problems in various disciplines other than computer science typically involve transforming the problems into algorithmic problems to which standard algorithms are applied. In addition, a thorough knowledge of the state of,