Diablo IV Ultimate Edition includes up to 4 days early launch access, exclusive in-game mounts, the Accelerated Seasonal Battle Pass Unlock, and more! Diablo IV is available on June 6th, 2023. Diablo IV Ultimate Edition includes up to 4 days early launch access, exclusive in-game mounts, the Accelerated Seasonal Battle Pass Unlock, and more! Diablo IV is available on June 6th, 2023.