Metzen was the creative director for Warcraft III: Reign of Chaos, and provided the game's story concept and script. He would hold this role in all of Blizzard's later video games. This date is critical because it marked the release of Warcraft III, a pivotal game in the Warcraft series that introduced key characters and lore elements that would later be expanded upon in World of Warcraft. Metzen's role as creative director was vital to the game's success.