If you are one of the many hardcore Destiny 2 players who desperately wants more to do after wringing everything you could out of the launch version of the game, there is great news. After a few hours of necessary server maintenance, the Destiny 2: Curse of Osiris expansion pack is now live for you and your fireteam to dig into.

Reported by Polygon, developer Bungie took Destiny 2 down for a few hours late Tuesday morning and into the early afternoon, but as of 1:00 p.m. ET, the maintenance window should be shut. By then, patch 1.10 should be implemented into the game and you should be good to go. Once you are finished reading this article, drop everything you are doing and go get some loot.

Curse of Osiris will run you $20 on PC, Xbox One and PS4. The new single player (or co-op) campaign focuses on Osiris, an old warlock who was exiled from the last human city some time before the events of Destiny . He has been spoken of in the game before, but Curse of Osiris marks his first in-person appearance to date. The story will take players to Mercury for the first time in Destiny 2 , as the closest planet to the sun was previously only the setting of a multiplayer map in the first game.

The new Fields of Glass exploration zone should have plenty to keep you occupied in your quest to level up and get even better loot than you already have. The expansion bumps the regular level cap up from 20 to 25 and the power level cap up from 305 to 335. Your main enemies this time around will be the Vex, the time-and-reality-bending robots you have shot thousands of times already throughout the Destiny series. Once again, they are up to no good on Mercury and you need to investigate.

Aside from a new campaign and three new multiplayer maps (one of them exclusive to PS4), the biggest new additions in Curse of Osiris are “raid lairs” and the Infinite Forest. Raid lairs are new, six-person challenges that have been added onto the existing Leviathan raid, as opposed to being an all-new raid by itself. The Infinite Forest, meanwhile, might be the most interesting new feature as it brings random level generation to Destiny for the first time. The layout, enemies and even time period will be different each time you go into the mysterious Vex construct.

Curse of Osiris is accompanied by patch 1.10, which adds a litany of new tweaks and features to the game which will apply even if you do not buy the expansion. Bungie outlined all of these new additions in a blog post last week, but not all of them will go live today; some of them are being held for another patch on Dec. 12. New weapon types, vendor inventories and more are all coming to the popular loot shooter in an attempt to keep players hooked for a few hundred more hours until the next expansion comes out in spring 2018.