LinuxQuestions.org - trouble installing game from a .rpm file

I'm a newbie, trying to lose the ball-and-chain of "Windows" I got a book (tutorial)
as a step-by-step to learn Linux. It calls to install a game from a website that is in
.rpm form. I followed the instructions exactly and when i try to open the .rpm file,
i get an error message: Could not open package. The file/home............. Could not
be read. Make sure that you have the proper permission on it.

I right click on the file to set the permission (as I am the only user of this computer)
and it is "ALL" checked, for owner, group, and others. It does this with all .rpm files,
I looked in the book, but theres no reference to this problem, let alone a solution, or
any contact info of the publisher, which brings me to here. I am new to Linux, but,
not a novice to operating systems, except programing, So, if anyone could help
me with this problem and tell me what I did wrong,
I would appreciate it, ty.