World of Warcraft: Battle for Azerothis an enormous expansion for Blizzard’s long-running online game, and the excitement surrounding all-out war between the Horde and the Alliance appears to be translating to big sales. The company hasannouncedthatBattle for Azerothis the best-selling expansion in the game’s history.

In just one day,World of Warcraft: Battle for Azerothmanaged to sell more than 3.4 million copies, narrowly edging out 2016’sLegionexpansion,which sold 3.3 million copiesin its first day.Battle for Azerothhas been on sale for just over a week as of now, so we’ll likely see those numbers continue to grow.

World of Warcraft: Battle for Azerothhas a lower barrier to entry than previous expansions, as Blizzard recently abandoned its “battle chests” in favor ofmaking all previous expansions and the base game free. This means that in order to enjoyBattle for Azeroth, all you have to do is purchase the expansion and a subscription toWorld of Warcraft. As six expansions had already released prior to the most recent one, it certainly makes entering the game for the first time easier.

Story quests and new areas are available inBattle for Azerothright now, and additional content will be coming soon in free updates. The upcoming content includes the Uldir raid, which launches on September 4, as well as the cooperative Warfront mode, which will arrive “in the coming weeks.”

World of Warcrafthas a reputation for being an all-consuming game, and players have shown their dedication sinceBattle for Azerothlaunched. One player going by the name “Gingi” managed tohit the expansion’s level 120 capjust four hours after the expansion launched. We’re not sure why anyone wouldwantto speed through a game like that, but we aren’t here to judge.

If you’re curious about whether you should pick upWorld of Warcraft: Battle for Azeroth, stay tuned for our full review. We’ll also have guides available to help you through the game, just in case you find its new features to be overwhelming.

World of Warcraft: Battle for Azerothis available now on PC and Mac.