Blizzard announced on October 4, 2023, that Diablo IV was scheduled to arrive on Steam on October 17.
Steam release date
The announcement named Steam as the platform for the planned release. That would give players who use Steam a way to access the action RPG through that storefront.
Image credits
Wikimedia Commons contributor · Public domain
Masterandbeef · CC0
Solomon203 · CC BY-SA 4.0