Like a Dragon: Infinite Wealth has become the Yakuza series' fastest-selling game to date, passing one million units sold within its first week on sale.Publisher Sega and developer Ryu Ga Gotoku Studio are celebrating by giving players some free downloadable content too. The Celebratory T-Shirt Set will be released "at a later date", with Sega advising fans pay attention to its social media channels to learn when the pack will be available.It's also unclear what the pack entails, but Infinite Wealth leans into the ability to change characters' outfits in battle, and goes even further in the post game, so Ichiban, Kiryu, and the team will likely be able to don a ridiculous looking t-shirt in battle and elsewhere.Infinite Wealth...