Which gaming company first introduced the concept of 'Battle Pass' as a retail promotion strategy for ongoing game monetization?

The gaming industry has transformed how virtual economies work, creating innovative retail strategies within digital worlds. From exclusive in-game stores to limited-time promotions, game developers have pioneered retail techniques that are now influencing real-world marketing. Test your knowledge about a groundbreaking retail promotion strategy that changed how games monetize virtual goods and created a blueprint for digital scarcity.

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Valve Corporation (for Dota 2)
Epic Games (for Fortnite)
Riot Games (for League of Legends)
Blizzard Entertainment (for Overwatch)