does not have an offline mode. It is an "always-online" game that requires a persistent internet connection to play on all platforms, including PC, PlayStation, and Xbox. The "Always-Online" Reality of Diablo IV
Travel-Friendly: Play on handheld devices (Steam Deck, ROG Ally) without needing a stable hotspot. diablo iv offline mode install
Solo Play Availability: While you can play through the entire campaign and end-game solo, you will still occasionally encounter other players in "hubs" or during open-world events. does not have an offline mode
Because there is no offline mode, there is also no official "offline installer" for the game. The "Always-Online" Requirement Explained In Battle