GameStop reported a nearly 22 per cent rise in second-quarter revenue on Tuesday, as the videogame retailer's efforts to revive its struggling business began to pay off, sending its shares up about 3 per cent in extended trading. The company's revenue increased to $972.2 million during the period, compared with $798.3 million a year ago. Once a dominant force in physical retail, GameStop has seen its market share erode over the years due to its slow shift toward digital purchases, while e-