"This Custom Games Browser is something the team has wanted to add for a long time for the community, but we needed the Content Browser and the search engine that powers it up and running first," 343 UX Design Lead Vincent Hui says in a blog post. "Thanks for being patient."

Today's update also adds an Observer mode, and it enables the Forge map editing tool and Arena multiplayer mode in Windows 10, though the desktop version still doesn't include matchmaking. Get the full details in both of 343's blog posts, here and here.