Today, Microsoft reversed this decision.
"Gamestop welcomes today's announcement from Microsoft about changes in functionality for its next-generation console, the Xbox One," Gamestop says. "This is great news for gamers and we applaud Microsoft for understanding consumers and the importance of the pre-owned market."
Gamestop makes the majority of its profit from used game sales, and following reports that the Xbox One wouldn't support used games, GameStop's stock fell 5 percent. Currently, Gamestop's stock is up 2.5 points in after-hours trading, almost 6 percent.