The archived post details the creation of a real-time multiplayer Tic Tac Toe game using React and PubNub, highlighting that the library versions discussed are outdated, yet the principles remain relevant. The game connects two players through a unique game channel, allowing them to play against each other with moves updated in real time. The post explains the setup process, including creating a channel for players to join, initializing the PubNub infrastructure for real-time interaction, and developing the game logic to manage turns, track scores, and determine game outcomes. It emphasizes the challenge of building scalable real-time infrastructure and introduces PubNub as a solution for handling message delivery across global networks with minimal latency. The guide includes steps to set up the game environment, such as obtaining API keys, enabling necessary features, and running the application, while offering insights into managing game state and user interactions through React components.