Diablo at 30: The Turn-Based Game That Became Real-Time in an Afternoon
Diablo was designed as a turn-based roguelike until Blizzard asked for real-time. Its lead programmer made the switch on a Friday afternoon, and the action RPG was born. Thirty years later, Diablo V has a 2029 date. The whole story.
The moment the action RPG was born, according to the man who programmed it, was a single mouse click. A warrior walked across the screen and smacked a skeleton to pieces, in real time. Until that afternoon, Diablo had been a turn-based game.
Diablo is turning 30. It shipped on December 31, 1996 in some places and in early January 1997 in others, and Blizzard has spent 2026 celebrating. At BlizzCon 2026 in Anaheim on September 12-13, it announced Diablo V for spring 2029, a 30th-anniversary season for Diablo IV and a Netflix animated series. Blizzard says more than 130 million players have entered Sanctuary across the series.
A turn-based dungeon crawler
Diablo was made by Condor, a small studio in Northern California co-founded by David Brevik, which Blizzard later bought and renamed Blizzard North. The original design was a "complicated turn-based game" in the tradition of Rogue and Wizardry. Brevik loved the tension of those games. He talked about "the sweaty palms" of nearly losing two weeks of progress to one bad move.
Then the Warcraft team at Blizzard's main office, which Condor called "Blizzard South", asked for real-time. Brevik's first reaction, as he told it at GDC in 2016: "Real-time? No, no, no, no, this isn't one of your strategy games."
The Friday afternoon that changed games
About six months into development, Brevik sat down on a Friday afternoon to try it. He had a real-time version running "in a few hours". His trick was simple: he made the turns happen 20 times a second. Then he clicked, the warrior walked over and hit a skeleton, and he knew. In his words, that was the moment the action RPG was "kinda born".
Diablo wasn't the first real-time RPG; games like Ultima VII and The Legend of Zelda came earlier. But it turned the click-to-attack loop into a genre: randomised dungeons, randomised loot and a hotbar. That hotbar arrived late, partly from feedback on a demo that shipped with PC Gamer in October 1996, about two months before release.
The game with two birthdays
Diablo's release date is still a small mystery. Blizzard North, a team of about 15 people, finished the game at midnight on December 26, 1996. Copies went out right before New Year's, and in the late-'90s world of boxed retail, some stores put them on shelves straight away while others waited. So some outlets list 1996, others 1997, and Diablo picked up 1996 Game of the Year awards from some of them.
The game also launched alongside Battle.net, Blizzard's free online service, which Blizzard Entertainment was building at the same time. Free online co-op on PC was a big deal in 1997, and Battle.net became the backbone of StarCraft, Diablo II and everything since.
Thirty years later: Diablo V and Hell's Legacy
Blizzard's BlizzCon announcements set out the next few years:
- Diablo V is in development for spring 2029. It's set in a Sanctuary where Diablo has already won and its heroes have been defeated, about a century after Diablo IV, according to reports from the show. No platforms have been announced.
- Season of Hell's Legacy for Diablo IV, live since September 15, is a playable tribute to 30 years of characters, monsters and loot, with Deckard Cain as a guide and Baal, Mephisto and Diablo to face.
- The Amazon class joins Diablo IV in the first half of 2027, from the island of Skovos, with four archetypes and bows and javelins.
- Diablo IV: Age of Hatred Collection arrived on Nintendo Switch 2 on September 15, bundling the base game with both expansions.
Why it matters
Diablo's influence goes far beyond its own sequels. Every loot-driven game, from Path of Exile to looter shooters, descends from the idea that clicking on monsters for random rewards is endlessly satisfying. And it almost didn't happen: a turn-based Diablo would probably have been a well-loved cult game, not the start of a genre. Thirty years on, the series is planning further ahead than ever, with Diablo V more than two years away.
What to play next
Diablo IV is the easiest way in today, on PC (Steam and Battle.net) and consoles, with the anniversary season live now. If you want history, the original Diablo is sold on GOG. And if you love the loop but want something stranger, Hades II and Path of Exile 2 are both very different descendants of that 1996 mouse click.