World of Warcraft – Wrath of the Lich King (Cinematic Trailer)

World of Warcraft - Wrath of the Lich KingFive years have passed since Arthas released Ner‚Äôzhul from his icy prison and merged with him, claiming the Frozen Throne of Icecrown. Now the heir of Lordaeron has risen again, and soon the world will learn what it means to incur the wrath of its one true king…. (Source)

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Diablo 3 (Debut Teaser)

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Diablo 3 It has been said that in the end of all things you would find a new beginning… (Source)

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Starcraft II (Zerg Reveal Trailer)

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Starcraft II Have the Zerg surpassed the Protoss to become the most powerful species in the galaxy? (Source)

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Update: Check comment for Terran Demo that was shown after the Zerg Reveal Trailer in the Korean presentation.