Requires the base game.

No One Can Stop Death in Diablo 3: Reaper of Souls

The Prime Evil rages within the Black Soulstone, its essence screaming for vengeance and release. Before the artifact can be sealed away forever, Malthael–Angel of Death–manifests in the mortal realms with a deadly new purpose: to steal the Black Soulstone and bend its infernal power to his will.
So begins the end of all things…

CHARGE FORTH AS THE CRUSADER
Impenetrable armor, gleaming weapons, and heavy, heavy damage–wield the power of the Crusader, unbreakable new hero of the mortal realms.

TAKE ACT V BY STORM
From the sprawling streets of Westmarch to the ancient walls of the Pandemonium Fortress, battle with a host of deadly new enemies throughout the all-new Act V of the Diablo III storyline.

RISE TO NEW HEIGHTS OF POWER
Advance your hero of choice through additional levels of supremacy, mastering bold new powers of raw, demon-slaying potential along the way.

Minimum Requirements

OS: Win Xp 32
CPU: Pentium D 820 2.8GHz / Athlon 64 X2 Dual Core 4400+
RAM: 1 GB
GPU: GeForce 315 512MB / Radeon HD 4550
HDD: 12 GB

Recommended Requirements

OS: Win Vista 32
CPU: Core 2 Duo E6600 2.4GHz / Athlon 64 X2 Dual Core 5600+
RAM: 2 GB
GPU: GeForce GTX 260 / Radeon HD 4870
HDD: 12 GB