A series of emails have come to light as part of a lawsuit, revealing a heated exchange between Epic Games CEO Tim Sweeney and Valve executives over Steam's policies. Sweeney's email to Gabe Newell, Valve's president, criticized Steam's 30% fees on game revenues, calling Valve 'you assholes', to which Valve's COO responded with a dismissive 'you mad bro?' The emails have sparked discussions about the tensions between the two gaming giants and their differing approaches to revenue sharing.