Diablo: Immortal will be available in most regions of the world on PC, iOS, and Android on June 2nd. People in various Asia-Pacific areas may have to wait a few weeks longer. It's a free-to-play game with some in-game purchases.
The PC version will be in open beta at first, but will include all material and features. All progress and purchases will be carried over as well. It will support cross-platform play and save, so you should be able to switch between PC and mobile device with ease. The MMORPG lets players to take on tasks in groups of eight, and it offers a faction-based PVP system.
Blizzard said in a blog post that it was undecided about building a PC version, which it refers to as "an experiment." Ultimately, the production team opted to make a native PC build because a substantial portion of fans would almost certainly try to play it using an emulator anyhow.