I want to play Montezuma and my Acer is telling me I need a adobe flash. What does that mean?
Chrome should have Flash Player capability built in. The version of Linux you have may not include it, however.
Also, I notice that your browser is severely out of date. Head to the menu and go to "About Google Chrome" to update it. Between that and downloading Flash Player from the link Jan gave, you should be able to fix your issue.
I would take it quite literal: You probably need to install Flashplayer.