Halo Wars 2 Title Updates
From Halopedia, the Halo wiki
Throughout its lifespan, Halo Wars 2 had many Title Updates and other patches. Given how many there are, this page only lists the patches and their general features; full patch notes are listed on each Season's page for brevity. For a full list of Halo Wars 2 official patch notes on Halo Waypoint, see the designated forum thread here. In February 2021, 343 Industries announced that it had no plans to produce any further content updates or balance patches for the game, although it would monitor the game and its servers to ensure they were running as intended.
The below table lists each patch by content type (IE bugfixes, server-side, balance etc) and date. You can click on the arrows at the top of each column to sort it - for a more comprehensive list, see the sections further down the page. For full patch notes on each update, click the link in the left-most column to be taken directly to the relevant section.