Battle Royale games are a type of multiplayer online games where players compete against each other in a virtual world until only one survivor remains. The design goal of these games is to provide a thrilling gaming experience and to improve the fluidity and responsiveness of the game through performance optimization measures. In this context, Call of Duty (COD) and Apex Legends (APEX) have become two representative Battle Royale games in the modern video game market, winning the affection of a vast number of players with their rich gaming experiences and high levels of player interaction. This study conducts an in-depth discussion on the design, implementation, and performance optimization strategies of these two games. Through the detailed analysis of the design concepts and core mechanisms of these games, valuable reference is provided. With the design and optimization of future Royale games, it has contributed to the technological progress in the field of game development.