Diablo IV: The Loot Loop With a Season Pass Bolted On

Blizzard shipped Diablo IV on 6 June 2023 for PS5, Xbox Series and PC, the first mainline entry since 2012’s Diablo III, and the game that had to answer a question the series itself invented the terms for: how do you follow up a genre-founding loot loop after the games it inspired — Path of Exile, Grim Dawn, a decade of imitators — have spent years pushing that loop’s math further than Blizzard’s own sequels had. The answer Diablo IV gives is a genuinely strong core loop wrapped in a live-service calendar the original 2000 game never needed, because in 2000 nobody expected a game to keep shipping content for years after launch. That wrapper is the actual subject worth examining, because the loop underneath it is very good, and the argument about this game is almost entirely about what surrounds it.

The loop, and why it still works

Strip away everything else and Diablo IV is doing what Diablo has always done: kill things, watch numbers and coloured item names drop, read the numbers, decide whether the new drop beats the old one, repeat at increasing difficulty until the decision-making itself becomes the pleasure rather than a means to an end. Five classes at launch — Barbarian, Sorcerer, Rogue, Druid, Necromancer — each with a skill tree deep enough to support multiple distinct builds, and an itemization system that layers affixes, legendary powers (unique effects extracted from legendary items and slotted into any gear via the Codex of Power), and, later, Paragon Boards — a second, separate skill-tree-like system unlocked after the level cap that turns endgame character growth into its own extended puzzle of node placement and glyph socketing.

The genre-founding trick Diablo invented and Diablo IV still executes correctly is the drop rate psychology: legendary and unique items are rare enough that finding one is a genuine event, common enough that one arrives often enough to keep the loop’s dopamine cycle running, and the game’s itemization is deep enough that even a “bad” legendary roll usually teaches you something about what the “good” roll would look like. That’s a harder balance to hit than it sounds — too rare and the loop feels punishing, too common and the loop feels weightless — and Diablo IV, whatever else is true of it, gets that specific balance right.

The open world’s honest limitation

Diablo IV is also the series’ first mainline entry to build a genuinely open, shared overworld between dungeon instances, complete with world bosses that any nearby player can join and Strongholds — fixed points of interest that convert into usable waypoints once cleared. The overworld’s actual job, though, is closer to connective tissue than to content in its own right: its main function is ferrying the player between the dungeons, events and bosses where the real itemization payoff lives, and once a player has cleared a region’s Strongholds and unlocked its waypoints, there’s little pull to revisit the open-world space itself rather than teleporting directly to the next Nightmare Dungeon sigil. That’s a fair trade rather than a failure — the loot loop was always going to be the game’s centre of gravity — but it’s worth being honest that the open world here is closer to a well-dressed hub connecting the actual game than a destination players return to for its own sake, the way exploration does in a game built around traversal first.

Helltides and Nightmare Dungeons as the actual endgame

Where the loop gets genuinely interesting is in the endgame content built to keep serving loot after the campaign ends. Helltides are timed world events that transform a region into a higher-density, higher-reward killing ground with a currency (Aberrant Cinders) that must be spent inside the event or lost when it ends, creating real urgency around a system that could otherwise feel like passive farming. Nightmare Dungeons attach modifiers (affixes that change monster behaviour or add environmental hazards) to specific dungeons via a sigil item, letting players tune difficulty and reward density precisely rather than relying on a single global difficulty slider. Both systems are legitimate design achievements: they give a game with, fundamentally, one core verb — kill things for loot — enough textural variety that the verb doesn’t wear out across the hundred-plus hours the genre expects a serious player to invest.

Where the seasonal model pulls against the loop

Here’s the friction the rest of the review needs to sit with honestly. Diablo IV launched committed to a quarterly Season model — Season of the Malignant, Season of Blood and further seasons following at roughly three-month intervals — each introducing a new mechanic, a fresh season-only questline, and, critically, a fresh character that starts from level one on a new seasonal realm. That’s the live-service industry’s standard retention playbook, borrowed wholesale from games built around it from day one, applied to a franchise whose core appeal has always been the permanence of a single, growing character. The tension is structural: the loop that makes Diablo satisfying is built on investment compounding over time — a build refined across dozens of hours, a stash of carefully hoarded materials — and a seasonal reset asks the player to abandon that compounding investment every three months in exchange for fresh content gated behind starting over.

Blizzard’s answer, eventually, was to let seasonal characters migrate their cosmetic and account- wide progress (Renown, some unlocks) to the eternal realm once a season ends, softening the reset’s sting, but the core ask — new season, new character, new grind to a competitive power level — remains the same trade a decade of games-as-a-service titles have made players comfortable with and comfortable resenting in roughly equal measure. It’s worth naming that this isn’t a flaw unique to Diablo IV so much as the clearest example yet of a single-player- descended genre absorbing a business model built for a different kind of game, and the seams show most in exactly the place Diablo’s original appeal lived: the permanence of your character.

World Tiers as a legibility fix the genre needed

One quieter but genuinely useful piece of design is World Tiers — four broad difficulty bands (Adventurer, Veteran, Nightmare, Torment) the player selects explicitly rather than difficulty scaling invisibly with character level the way earlier entries in the genre sometimes did. Committing to an explicit, named tier the player consciously opts into does real communication work: it means a player who feels undergeared can drop back a tier without that decision feeling like a hidden penalty, and a player chasing the highest-value drops knows precisely which tier they need to be surviving in rather than guessing at an obscured internal scaling formula. It’s a small piece of UI honesty in a genre that has historically buried its difficulty math under layers of internal systems the player was never meant to see directly, and it makes the rest of the itemization math easier to reason about, because at least one major variable is stated plainly rather than inferred.

Vessel of Hatred and the class the base game needed

The October 2024 expansion, Vessel of Hatred, added a sixth class — Spiritborn, a martial-arts- inflected fighter channelling animal-spirit powers — and a new region, Nahantu, along with Mephisto as the expansion’s central antagonist. Spiritborn’s arrival is worth noting specifically because of how it plays against the base five: where Barbarian and Druid lean into weighty, grounded combat, Spiritborn is fast, acrobatic, and built around chained evasive movement between strikes, giving the class roster a genre of combat feel the base game hadn’t covered. It’s the clearest sign that Blizzard used the expansion cycle correctly — filling an actual design gap rather than just adding numbers to existing systems.

The systems ancestor and where this desk has argued the same fight before

The tension between a satisfying core loop and a season-driven content calendar isn’t unique to this franchise, and it’s worth reading against Risk of Rain 2: the difficulty curve as a clock for a smaller-scale, non- seasonal answer to the same “how do you keep a loot loop interesting over time” question, and against why inventory management refuses to die for the deeper argument about why genre audiences keep tolerating systems friction that other genres would call a chore. Diablo IV’s real ancestor, though, is its own franchise: the itemization philosophy running in a direct line back to 2000’s original Diablo, refined and re-litigated across four sequels’ worth of Blizzard’s own internal arguments about drop rates.

The verdict: the loop is as good as the genre gets, the seasonal wrapper around it is the honest cost of keeping a single-player-rooted franchise alive on a live-service calendar, and whether that trade is worth it depends entirely on how much a player values a permanent character over a constant supply of new toys.

Spoilers below

The base campaign’s antagonist, Lilith — daughter of the Prime Evil Mephisto and the angel Inarius, and the original founder of Sanctuary itself in the setting’s backstory — is defeated at the campaign’s climax, but the ending withholds a clean resolution: rather than being destroyed outright, Lilith’s fate is left ambiguous enough that the story explicitly sets up Mephisto himself, her father, as the next Prime Evil threat to Sanctuary, a thread Vessel of Hatred picks up directly by making Mephisto the expansion’s central antagonist. The campaign’s mid-game reveal that Inarius, Lilith’s former partner and the angel who helped found Sanctuary, has spent the intervening centuries as a cruel, self-serving ruler rather than the benevolent founder his early appearances imply, is the strongest piece of writing in the base game — a slow turn rather than a twist, seeded well before it’s confirmed.

What to play next: for the loot-loop pleasure without the seasonal reset structure attached, Vampire Survivors: the game that plays itself, almost distils the same dopamine cycle down to its purest, cheapest form.