As the design of Quiver [Half-Life] started to take over some of Prospero initial goals, Prospero evolved into a massively multiplayer game. It was also intended to be distributed with a mix of official and user-created worlds that could be accessed through an in-game library, and each game would be running on its own server. Online distribution, server browser, a friend finder, user-created content and other concepts initially conceived for Prospero would eventually find their way into the Half-Life series, Steam, and Valve's support of fan-made modifications.