Which game's digital marketing campaign first utilized an Alternate Reality Game (ARG) that led players on a real-world scavenger hunt, creating massive pre-launch engagement?

The gaming industry has revolutionized digital marketing strategies with innovative approaches to player engagement and community building. From viral campaigns to influencer partnerships, gaming companies have pioneered unique ways to promote their virtual worlds and products. This trivia question focuses on a groundbreaking digital marketing campaign that changed how games are promoted online. Test your knowledge of gaming industry marketing history!

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Halo 2's 'I Love Bees' campaign (2004)
World of Warcraft's 'Corrupted Blood Incident' (2005)
Portal's 'Potato Sack' ARG (2011)
Fortnite's 'Black Hole' event (2019)