Cpx extension is related to Age of Empires I and II Campaign File. You can try to open cpx files with Age of Empires game.
Cpx extension stands for scene files. These file formats are associated with strategy game called Age of Empires. You have chance to play new chapters by putting these cpx files into the game. You can get detailed information about this popular strategy game from the following links.
What to use cpx
Age of Empires Game
which page related to cpx file
cpx Related Searches
You can check related links about cpx fileextension.