Blizzard is celebrating the 20th anniversary for Diablo by opening up a number of different events centered around the franchise. This includes brand new features for Diablo 3: Reaper of Souls, as well as Diablo-themed content making its way into every other Blizzard game on the market.
According to Polygon, there will be Diablo-themed content featured in StarCraft II, Overwatch, Hearthstone, Heroes of the Storm and World of Warcraft. This includes adding in portraits and sprays from Diablo into Overwatch and StarCraft II. They also have plans on including a new Tavern Brawl into Hearthstone: Heroes of Warcraft. Players will face off against a "hooded stranger" in the game who has his own special grim deck.
Heroes of the Storm gets two specialty pieces from the long-running isometric action-RPG. Gamers dabbling in the free-to-play MOBA will be able to experience a new brawl map along with a new portrait to acquire.
World of Warcraft also has an interesting event planned to take place, which includes denizens from Sanctuary crossing over into Azeroth. What exactly that means or how that all ties into Diablo remains to be seen, but each of these specialty events for Blizzard's games will roll out over the course of the next month.
Of course, that just leaves Diablo 3 in terms of what specialty content will be present in the 20-year-old brand that made huge waves back in the late 1990s on PC and the original PlayStation. According to the article, Blizzard will hold a Darkening of Tristram event, which will see players being able to partake in a limited dungeon crawl that features a number of different specialties, such as the retro-vision so you can see the game in old-school Diablo.
The dungeon run will also feature some exclusive new items for players to grind out and loot. This includes items from the original Diablo, along with legendary gear from the first game.
Blizzard announced the news about the event back at BlizzCon, and they've held to their word by releasing the retro map into the public test realm back in mid November. They're now focusing on celebrating the anniversary for the isometric action-RPG by putting in all of the aforementioned items into their various other games.
Diablo has been a hugely influential game throughout the years, really bringing the action-RPG sub-genre into the mainstream. There have been imitators throughout the years and even a nice cache of alternative games made with a similar design that have cropped up in recent years, but the original fantasy Gothic game was just one of a kind when it first released. It was also one of the few games out there that introduced PK'ing into the gaming community, which was known as "player killing". Some players would invade a game and kill the other three players for the loot and experience. If you did it enough times people would warn others in the global chat about someone being a "PK'er". 20 years later and now "PK'ing" has become the whole point of MOBA games.
Anyway, you can enjoy the new events, features and lootables by hopping into the various Blizzard games and enjoying the new celebration content being rolled out over the course of the next month.