Which gaming product advertising campaign broke records in 2011 by using a fully-interactive live demonstration that was initially mistaken for actual gameplay footage?

The gaming industry has pioneered innovative advertising techniques that have revolutionized how products are marketed to players. From in-game billboards to viral campaigns, gaming companies have pushed boundaries in product advertising. Test your knowledge about one of the most significant and unexpected advertising campaigns in gaming history that changed how games are marketed worldwide.

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Dead Island's reverse-chronology emotional trailer
Skyrim's dragon attack commercial featuring real-world locations
Portal 2's alternate reality game involving hidden potatoes
Call of Duty: Modern Warfare 3's 'The Vet & The n00b' celebrity campaign