(Image credit: Love Conquers All) It's Mastercard's world; we just live in it. That's my understanding based on a recent communiqué from Valve to PC Gamer, which confirmed that, yup, the company sure did recently remove a whole spate of adult games from its storefront because it made payment processors upset."We were recently notified that certain games on Steam may violate the rules and standards set forth by our payment processors and their related card networks and banks," said Valve. "As a r...