Diablo 4, the latest addition to the Diablo series, celebrates the franchise's 30th anniversary. The game brings back Diablo, the primordial demon who has been a central antagonist in previous titles. In Diablo (1996), Diablo was the final boss who hid in the cathedral of Tristram. In Diablo II (2000), he appeared as a dark traveler and later as a demon in the Chaos Sanctuary. In Diablo III (2012), he returned as a powerful demon and the final boss in the Paradise Act. The Infernal Heritage season reintroduces Diablo in Tristram, alongside the other two infernal brothers: Baal at the summit of Arreat and Mephisto in the heart of the Prison of Hatred. Deckard Cain, the Horadrim scholar who was killed in Diablo III, reappears as a lost soul with unresolved regrets. His voice, provided by actor Michael Gough, adds a nostalgic touch to the game. A new feature called "renaissance" allows players to transition an eternal character into the seasonal realm. The game was released simultaneously on the Switch 2, bundled with the base game and its two expansions. This was one of the major highlights from the BlizzCon event. Diablo 5 is already in development and is expected to launch in spring 2029. This means Diablo 4 will not undergo significant changes, as the story will be set a century after the events of the current game. However, the seasons system will continue, with each season lasting three months before moving on to the next era. A new class, the Amazon, is planned for release in 2027. Blizzard has stated that the game will be supported as long as the community plays it, but there will be no new expansion. The studio had once aimed to release one expansion per year but was unable to maintain that pace. It remains unclear whether Blizzard will develop another class after the Amazon. Blizzard has hinted that the seasons could become more detailed and complex, as the end of expansions allows the studio to focus resources and time. However, the company has not specified what criteria would determine whether a game is still active or abandoned. Despite this, Blizzard has a strong track record in this area, as seen with Heroes of the Storm, which has been on hold for four years but still receives balance updates and new characters. The 30th anniversary provides a nostalgic opportunity for players to return to Tristram and honor an old companion before Blizzard moves forward with the next chapter. Diablo 5 is already in the works, with the demon king having triumphed and Sanctuary now fallen.