Blizzard releases update 2.4.3 for Diablo 3, launching a special 20th anniversary event that includes a retro dungeon styled after the original Diablo game.

In celebration of Diablo‘s 20th anniversary, Blizzard has added Diablo references to many of its major games. For example, Overwatch now has Diablo sprays for players to litter around the maps, and World of Warcraft has the secret cow level for adventurers to discover. It’s only fitting that Blizzard has updated the latest entry in the Diablo franchise to honor its 20th anniversary as well, with Diablo III: Reaper of Souls receiving update 2.4.3 on PC, PS4, and Xbox One.

With update 2.4.3Diablo III now has a special retro-style dungeon players can visit in Adventure mode. Complete with old school graphics, sound effects, controls, and more, Diablo III‘s old school dungeon contains 16 floors filled with enemies and bosses from the original game for players to conquer. Those that want to experience classic Diablo gameplay in the world of Diablo III will want to be quick about it, though, as The Darkening of Tristram event will only last until the end of January. Anyone that misses out will have a chance to experience it again every subsequent January, as Blizzard plans on bringing it back for Diablo‘s birth month each year.

In the meantime, update 2.4.3 does more than just give gamers a taste of classic Diablo. Besides launching this limited time The Darkening of Tristram event, the new update also adds the seventh piece of the Crusader’s Armor of Akkhan set, and tweaks a variety of other items in the game, as well as makes a few minor balance changes.

PS4 Pro owners have even more reason to be excited about update 2.4.3 than Diablo III players on other platforms. Not only will PS4 Pro owners enjoy the same 20th anniversary event, content updates, and balance changes, but they can also start playing Diablo III in 4K resolution after they download the update. Some games have enjoyed additional performance boosts on PS4 after being updated specifically to take advantage of the upgraded system’s extra power, but Blizzard hasn’t listed any other benefits in the 2.4.3 patch notes besides the ability to play it in 4K resolution.

With the release of update 2.4.3, Blizzard will have completed one of its major content update promises it made for Diablo III at BlizzCon 2016. While it seems like Blizzard’s support for Diablo III is winding down compared to its other major releases, there’s still quite a bit for fans to look forward to, including the brand new Necromancer class. Unfortunately, we still don’t know when fans can expect to see the Necromancer class added to Diablo III, but if Blizzard keeps its word, it should come to the game before 2017 comes to a close.

Diablo III is available now for PC, PS3, PS4, Xbox 360, and Xbox One.