The second big DLC expansion for Destiny 2 is now available. Bungie has released Warmind along with update 1.2.0 and hotfix 22.214.171.124, bringing a variety of new content to the game on PS4, Xbox One, and PC--both for those who own the DLC and those who do not.
Warmind introduces a new campaign set on Mars, where players have to deal with the Hive as they explore the birthplace of Rasputin, a Warmind that's been involved with Destiny's story before. Satellites still in orbit from the Golden Age begin crashing into Mars, causing glaciers to melt, revealing Rasputin's core and Hive enemies that had been frozen. There's new gear to acquire--including a variety of Exotic weapons and armor--Crucible maps, a Raid Lair, and a new horde mode-style activity called Escalation Protocol.
Those playing on PS4 will, as in the past, get more content than Xbox One and PC players for a period of time. Warmind comes with an additional Strike and armor for each class on PS4. These will eventually come to other platforms, but not until at least Fall 2018.
Warmind's new Crucible maps are actually available to all players due to a change made with update 1.2.0. All DLC maps can be played in matchmaking, but you'll need to own the expansion to play them in private matches--another newly added feature. The patch makes numerous gameplay changes, including updates to most of the game's Exotic weapons to help them feel more viable and distinct.
Update 1.2.0 also marks the start of Season 3 in Destiny 2. It introduces Crucible rankings, giving you new means of progression--and ways to acquire rewards--in the PvP multiplayer mode. You can see everything that's changed in the full patch notes on Bungie's website. The update is followed up by a small hotfix patch, 126.96.36.199.