Which game company pioneered the first major digital marketplace that allowed players to create and sell their own virtual items to other players for real currency?

The gaming industry has revolutionized digital commerce with innovative in-game marketplaces and virtual storefronts. From simple item shops to complex player-driven economies, these platforms have transformed how players interact with games and each other. Test your knowledge about the evolution of e-commerce within gaming ecosystems and how major companies have pioneered new ways to blend gameplay with commercial transactions.

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Valve Corporation (with Steam Workshop and Team Fortress 2's Mann Co. Store)
Blizzard Entertainment (with World of Warcraft's Auction House)
Sony Online Entertainment (with EverQuest's Station Exchange)
Electronic Arts (with The Sims' Exchange Platform)