Running a private server for fun among friends is rarely prosecuted, but attempting to make money off of a private server (via item shops or subscriptions) drastically increases your chances of receiving a Cease and Desist (C&D) letter. Where to Find Community and Support

Many developers use these files to learn about massive multiplayer network architecture, C++ or C# programming, and complex SQL database management.

These feature the original mercenaries and lower level caps. They are highly sought after by purists who dislike the power creep of later expansions.