The Elder Scrolls Online continues to grow and evolve, with its latest DLC pack, Dark Brotherhood, scheduled to come out on May 31 for PC and Mac. Bethesda announced the release date today, also confirming that console versions will come out on June 14 for Xbox One and PlayStation 4.

Dark Brotherhood is free for people with an ESO Plus membership ($15/month), while it can be purchased separately for 2,000 crowns from the game's virtual marketplace. Crowns are sold in allotments of 750 ($8), 1500 ($15), 3000 ($25), and 5500 ($40).

A Collector's Bundle featuring the DLC, as well as the Highland Wolf mount, the Synvan Nixad ped, and five Crown Experience Scrolls will also be offered, priced at 4000 crowns.

The new Dark Brotherhood DLC pack sees players joining an "infamous guild of assassins" in the region of the Gold Coast, which was last seen in 2006's The Elder Scrolls IV: Oblivion.

The content comes with a new passive skill line, "hours" of new quests to take on, more gear, and new world boss encounters, among other things.

"Become the deadliest assassin with a new and exclusive passive skill-line, defend the Brotherhood against a mysterious foe in hours of new story content, prove your skill for homicide in new repeatable assassination quests, and more," reads a line from the DLC's description.

Though Dark Brotherhood doesn't officially launch until next month, PC players can test it out on The Elder Scrolls Online's public test server starting today, April 25. For lots more on Dark Brotherhood, check out this blog post.

Elder Scrolls Online was released in April 2014 for PC and dropped its compulsory monthly subscription in January 2015. It now has a pay-once model with further support from microtransactions. Its console versions debuted on PS4 and Xbox One in June 2015.

The last major expansion for The Elder Scrolls Online was Thieves Guild, which was released in March. It introduced new story content, activities, skills, and more.

If there are to be more announcements regarding the future of The Elder Scrolls Online, they could come at Bethesda's E3 2016 briefing in June.