Blizzard has released Warcraft III demo yesterday. Here is the storyline of Warcraft III demo:

After receiving an ominous warning from a mysterious prophet, the Orc warchief Thrall must guide his warriors to a strange new land in this fully playable demo of Warcraft III: Reign of Chaos. Whether you’re new to real-time strategy or a skilled veteran, you’ll be in for a challenge as you navigate the Orcs through lush 3D environments and lead them into battle against those who stand in their way. Can you rally the Horde in the face of extinction?

The demo features a two-mission tutorial introducing players to one of the central Heroes of Warcraft III, three all-new missions that chronicle the Orcs’ embattled journey to Kalimdor and head-to-head play through, Blizzard’s free online gaming service.

The demo is about 100mb in size. Click here to visit the official Warcraft III demo site.