Steam's current promotion is specifically described as free access to the Diablo IV base game, with all classes available and progression capped at level 30. This is not a giveaway where the game permanently joins your library, and it does not suddenly include Vessel of Hatred or Lord of Hatred. The expansions remain separate purchases. But for someone who has spent the last three years watching Diablo IV change from a distance, level 30 is more than enough time to discover whether clicking on demons still produces the correct chemical reaction.
Diablo 4 Is Free Until September 21
The free Steam period runs until September 21 at 10 a.m. PT. Steam lists it directly on the Diablo IV store page, where new players can currently start the game without purchasing the Standard Edition.
The promotion is unusually well timed. Season of Hell's Legacy only launched this week, bringing Diablo IV's 30th anniversary celebration with it. That season includes Waking Nightmares based on encounters from across the franchise, the return of Deckard Cain's soul, new Legacy Uniques and three Prime Evil progression paths built around Diablo, Baal and Mephisto.
The launch itself was hardly elegant. We covered how Season 15 had to be delayed after login problems before the Seasonal Realm finally reopened. But the normal seasonal game is now playable, making the free period a much better introduction than staring at Error 300008 and wondering whether Hell had outsourced account management.
You Can Play Every Diablo 4 Class
Steam's Season 15 announcement says free players have access to all classes available in the Diablo IV base game.
That gives new players considerably more freedom than a traditional demo built around one character and a carefully selected dungeon. You can start a Barbarian, decide swinging two-handed weapons lacks subtlety, move to Sorcerer, discover that subtlety was overrated anyway, and continue experimenting until something sticks.
The important limitation is the level cap.
Free access progression stops at level 30.
That means this is enough time to experience the basic combat loop, experiment with skill builds, explore Sanctuary and get a proper sense of how Diablo IV feels, but it is not a free ticket into the deepest parts of the endgame.
You are not using the free weekend to build a Torment XII monster and begin arguing about Pit Tier 150.
You are deciding whether you want to spend the next several hundred hours eventually becoming that person.
This Is the Base Game, Not Age of Hatred
This distinction is worth making very clear because Steam is currently advertising several Diablo IV products at the same time.
The free access offer applies to the Diablo IV base game.
The separate Age of Hatred Collection contains the base game together with Vessel of Hatred and Lord of Hatred. That collection is still a paid product.
Lord of Hatred itself is also currently discounted, but it is not included merely because you clicked the free-play button on Steam.
That means expansion classes, campaigns and features that require expansion ownership should not be confused with the free base-game access.
Steam is letting you test Diablo IV.
It has not accidentally given the entire franchise away because somebody leaned on the wrong button after BlizzCon.
The Standard Edition Is Still $12.49
The free period also overlaps with the huge sale we covered before BlizzCon. Diablo IV's Standard Edition dropped 75% to $12.49 on Steam, and that discount remains active.
Even better for anyone using the free access as a trial, the sale lasts longer than the trial itself.
Steam currently lists:
- Free access: until September 21 at 10 a.m. PT
- Diablo IV Standard Edition: $12.49, 75% off until September 24
- Lord of Hatred: $29.99, 25% off
- Age of Hatred Collection: $69.99
That gives free players a few days after the trial ends to decide whether they actually want to purchase the game at the reduced price.
Which is considerably friendlier than ending the sale five minutes after your level 30 Barbarian finally starts becoming interesting.
You Still Need a Battle.net Account
There is another requirement that has not changed just because the price temporarily reached zero.
The Steam edition of Diablo IV requires a Battle.net account.
Steam lists the third-party account requirement directly on the store page. Diablo IV also remains an online game, so free access should not be confused with some newly released offline edition where Lilith politely waits until your internet connection returns.
Existing players who already use Battle.net should be familiar with the system. New Steam players will need to connect the necessary account before entering Sanctuary.
Level 30 Is Enough to See Whether Diablo 4 Works for You
A level 30 cap sounds restrictive if you already think of Diablo IV in terms of Paragon points, Mythics and high Torment farming. For a completely new player, it is actually a fairly sensible cutoff.
The early game lets you answer the important questions.
Do the classes feel good?
Do you enjoy the combat?
Does Sanctuary make you want to explore it?
Do you enjoy constantly comparing two pairs of gloves whose statistical differences could reasonably be submitted as tax documentation?
If the answer to those questions is yes, the later systems become relevant.
If the answer is no, there was little value in giving the trial another seventy levels.
Season 15 Makes This a Particularly Good Time to Try Diablo 4
The timing also means newcomers are arriving during one of Diablo IV's stranger seasons.
Season of Hell's Legacy is explicitly built around Diablo's 30th anniversary, so Blizzard has packed it with material from across the entire series. Nearly twenty classic bosses and characters return through Waking Nightmares, while the seasonal questline eventually revolves around Diablo, Baal and Mephisto.
Yesterday we also discovered that Blizzard hid Diablo II-style Runewords inside Season 15 without putting them in the patch notes. Players have already uncovered Stealth, Enigma, Infinity, Grief and other familiar names through secret Horadric Cube recipes.
For a completely new Diablo player, much of that nostalgia will obviously land differently.
For somebody who played Diablo II twenty years ago and skipped Diablo IV, however, Season 15 is practically standing outside with a sign saying, "Look, we found your old stuff."
Not Every Season 15 Feature Is Available Without Expansions
There is one catch to entering during Season 15.
Diablo IV's current ecosystem is now split between the base game and expansion content. Some seasonal objectives and systems interact with Lord of Hatred, and we recently covered how roughly 15% of Season 15 objectives require Lord of Hatred if you want every Season Rank reward.
That does not mean Season 15 itself requires the expansion.
The season remains playable without buying Lord of Hatred.
It means free Steam players should not expect every objective, class, region or endgame system currently appearing in Diablo IV coverage to belong to the base game trial.
Diablo IV has accumulated expansions.
The free period has not temporarily abolished commerce.
The Free Trial Arrives as Diablo 4 Enters a Strange New Era
This is also a more interesting time to sample Diablo IV than it would have been six months ago.
BlizzCon 2026 changed the long-term context dramatically.
Diablo V is officially coming in Spring 2029. Blizzard currently has no additional traditional Diablo IV expansions planned after Lord of Hatred, but the studio says Diablo IV itself will continue receiving seasons, class additions and long-term support.
That makes the current game something unusual.
It is no longer the newest numbered Diablo waiting indefinitely for its eventual successor.
We know the successor exists.
We know roughly when it arrives.
And Diablo IV now has several years to develop into the bridge between the current version of Sanctuary and whatever terrible century eventually produces Diablo V.
New players arriving through Steam are therefore entering a game whose destination is much clearer than it was at launch.
The $12.49 Sale Makes the Free Period Much More Useful
Free weekends are usually excellent at producing one slightly uncomfortable moment.
You spend several days enjoying the game.
The trial ends.
You discover the normal price.
You suddenly remember all the other games already waiting in your library.
That problem is considerably smaller here because the base game is currently 75% off.
If someone reaches level 30 during the free period and decides Diablo IV works for them, $12.49 is a dramatically different decision from the game's original launch price.
That is presumably the entire point.
BlizzCon generated attention.
Season 15 provides fresh content.
The free period removes the first barrier.
The sale lowers the second.
And Diablo V sitting in 2029 gives anyone returning to the franchise something very large waiting on the horizon.
You Have Until September 21 to Find Out
For anyone who has never played Diablo IV, the decision is unusually uncomplicated this week.
Download it on Steam.
Connect Battle.net.
Choose a class.
Play until level 30.
See whether Sanctuary still has the ability to consume an evening without asking permission first.
If it does, the Standard Edition remains $12.49 until September 24.
If it does not, you have spent nothing except several hours discovering that your personal tolerance for exploding goatmen is lower than expected.
Diablo IV has been many things since 2023.
For the next few days, at least on Steam, expensive is not one of them.
