Microsoft are celebrating the 20th anniversary of Xbox by surprise releasing Halo Infinite Multiplayer early on Xbox and PC. The multiplayer side things was announced to be free to play, but it was assumed it was launching along side the full game on December 8th. Some rumours were floating around recently hinting at a possible November15th release date for multiplayer when the date was seen on the games store page by an avid fan.
That date was mostly assumed to be error or possibly pre-loading dates, but nope. November 15th is the official release date for Halo Infinite Multiplayer (I.E right now), also worth repeating that this is entirely free to play, so anyone can start downloading right now.