Halo Infinite's co-op campaign isn't officially coming until around the end of the game's first season in May 2022, but that hasn't stopped a number of players from enabling the mode anyway, though it seems doing so may put your game saves at risk.
As spotted on the Halo subreddit, someone has managed to glitch their way into split-screen campaign co-op. We've managed to replicate this ourselves using instructions that have since been shared online, confirming that it does indeed work.
On
Read more on gamespot.com