Platforms
Asus ROG Ally
The Asus Ally is a handheld gaming device and Steam Deck competitor. Diablo 4 should run great on it.
Linux version?
Players on Linux distros won't have native support for Diablo 4, but can use Wine and Lutris to play.
Mac version?
There will be no native Mac/MacOS version of Diablo 4. Players will likely be able to use Boot Camp to play.
Mobile version?
Blizzard won't be releasing any version of Diablo 4 on mobile devices. Diablo: Immortal will have to suffice.
PC controllers
For the first time in a Diablo game, PC players can use controllers, just like console players can.
PC Requirements
You'll need a somewhat modern machine and to handle Diablo 4's demanding gameplay.
Platforms list
The game has three official platforms for its June 6, 2023 release date: PC/Windows, PlayStation, and Xbox.
Steam Deck
Valve's popular handheld gaming device, the Steam Deck, should support Diablo 4 -- with tweaks.
Switch version?
Unlike Diablo 3, there will be no Nintendo Switch version of Diablo 4. The hardware demands are too high.
Settings
Error codes
Diablo 4 has over 150 error codes to help players understand login, messaging, and multiplayer issues.
Gameplay settings
Health bars, highlights, item labels, tooltips, and more are customizable in Diablo 4's Gameplay Settings.
Graphics settings
Diablo 4 will support a wide range of screen resolutions, aspect ratios, and devices, including ultrawide monitors.
Keybinds
There's keybinds for skills, movement, potions, mounts, and more in the Settings > Controls tab.
Languages
Similar to other Blizzard titles, Diablo 4 will likely support many of the top spoken languages in the world.
Social settings
Chat windows, chat bubbles, and notifications can all be tweaked to the player's liking in Diablo 4.
Sound settings
Players can adjust volume controls, voice chat, text-to-speech, subtitle, and loot drop sounds.
Misc
Addons?
Blizzard won't allow addons in Diablo 4, but is integegrating many quality-of-life features into the game.
Offline mode?
Players will always have to be connected to the Internet (and Battle.net) to play Diablo 4.
Impressive graphics, flexible settings
Diablo 4 will be the first in the Diablo series to allow cross-play between PCs and consoles (Xbox confirmed, with PlayStation likely). Also, for the first time, PC players can use controllers if they wish. Blizzard has no plans to support third-party addons, hoping to implement everything players need in-game, or an offline mode, since the connected and multiplayer aspects of the game offer the best experience.