The new maps are expected to release to the general public as part of season 6, which still does not have a confirmed release date. The Master Chief Collection has taken a battle-pass approach to its multiplayer, with new content slowly being added between large content drops with each new season. RELATED: Halo Infinite Blog Post Contains Secret Audio Log
This forgotten Halo game was only officially available in Russia, but 343 is now adding maps from Halo Online to Halo: The Master Chief Collection. The game was called Halo Online, and the project was scrapped after only a few months. In 2015, 343 Industries held a closed beta for a free-to-play multiplayer shooter built on the Halo 3 engine.
Some members of the Halo Insider program have been testing these new maps and haven given players a preview of the new content coming to the fourteen-year-old game. Halo developer 343 Industries is adding new maps to Halo 3 with the upcoming season in Halo: The Master Chief Collection.