Which gaming platform pioneered the 'season pass' retail model that has since become standard practice across the gaming industry?

The gaming industry has transformed how digital products are sold and distributed to consumers. Virtual marketplaces have become sophisticated retail environments with unique consumer behavior patterns and innovative supply chain models. This trivia question explores a fascinating aspect of how game platforms have revolutionized digital retail experiences and consumer purchasing behavior.

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Xbox Live with 'Call of Duty: Modern Warfare 2' (2009)
Steam with 'Half-Life 2: Episode One' (2006)
PlayStation Network with 'Resistance: Fall of Man' (2008)
Nintendo eShop with 'New Super Mario Bros.' (2010)