This document contains all the important changes in PHost 4.x compared to PHost 3.x and earlier. This file does not claim to be 100% complete. PHost 4 contains some rather intrusive changes, to rules and otherwise, so that one could possibly talk of PHost 4 as a different hosting program. But actually, PHost 3.x and 4.x are based upon the same code base; when technically possible, some of these changes are also made available in a 3.x PHost. We will continue to maintain the 3.x series as long as possible.

In a nutshell: PHost 4 contains all these things that make it too different from PHost 3 to share a common version number.

To get this straight: PHost 4 is a hosting program for VGA Planets 3.0 or 3.5, as a replacement for the Host program 3.x. It has nothing to do with the game "VGA Planets v4", which is something completely different.