Desura is steam like client for Linux to play all kinds of games. (Some games are not free).
Go to www.desura.com
and download desura-i686.tar.gz from their download button to your home/yourusername folder if possible.
Open a terminal console like Konsole, LXTerminal or Gnome Terminal etc. This can be found in the PCLinuxOS Menus under More Applications -> Terminals Any terminal will do.
Firefox saves the desura-i686.tar.gz in the Downloads folder so you will need to move it
[texstar@thenudiebar ~]$ mv /home/yourusername/Downloads/desura* /home/yourusername
Now you need to extract the desura-i686.tar.gz with the following command
[texstar@thenudiebar ~]$ tar -xzvf desura-i686.tar.gz
Next cd into the desura folder it created.
[texstar@thenudiebar ~]$ cd desura
Now you can run the program by typing the following
[texstar@thenudiebar desura]$ ./desura
The first time you run it you will need to create an account and verify your email address before you can login. After that you are in like Flynn!
More later...got to get my game on now.