>>10255507During the seventh generation of gaming consoles (PlayStation 3, Xbox 360, and Wii), the Xbox Live Marketplace was the first online store to launch, predating the PlayStation Store and the Wii Shop Channel.
As for the first game or set of games to introduce paid DLC during this generation, a notable example is "The Elder Scrolls IV: Oblivion" developed by Bethesda Game Studios. In 2006, Bethesda released the "Horse Armor Pack" as downloadable content for the Xbox 360 version of the game. This DLC offered cosmetic armor for the player's horse but was met with mixed reception due to its relatively high price for what it offered. The Horse Armor Pack is often cited as one of the earliest and most infamous examples of paid DLC during that era.
While "The Elder Scrolls IV: Oblivion" was not the very first game to have paid DLC on the Xbox 360, it is one of the earliest significant instances that gained attention and sparked discussions about the concept of paid additional content.