Disclosure: Nighthawks writer Richard Cobbett has contributed articles to RPS, with his most recent as of writing being a Fable-themed feature from 2018. Vampire RPG Nighthawks has been slapped with a mature content label just as its release beckons, in the latest high-profile instance of Valve’s determination of what constitutes an adult game proving controversial. Developers Richard Cobbett and Wadjet Eye Games say they’re working on convincing Valve to reverse the decision, which would allow the game to once again…