rpm fusion
I have reinstalled fedora 21 x64, and the first time it was installed rpm-fusion worked fine. It actually installed. But this time I just get a message that says "Sorry this did not work". It is really agrivating as I can not install steam or anything else on rpm fusion. It doesen't give me anything to work with except "Sorry this did not work". I am new to fedora, I have never used a non ubuntu system so this is new to me. Right out of the box and im getting errors. I have much to learn about linux.
What exactly did you try doing? and what's the exact error message you got?
Same problem, Aniship's answer worked fine to install steam for me. but started GL2 error, installed i386 nVidia driver package to fix that.