Fedora

Google Chrome

File: /etc/yum.repos.d/google-chrome.repo

[google-chrome]
name=google-chrome
baseurl=http://dl.google.com/linux/chrome/rpm/stable/$basearch
enabled=1
gpgcheck=1
gpgkey=https://dl-ssl.google.com/linux/linux_signing_key.pub

$ su -l

# yum install google-chrome-<stable/beta/unstable>

Steam

File: /etc/yum.repos.d/steam.repo

[steam]
name=Steam RPM packages (and dependencies) for Fedora
baseurl=http://spot.fedorapeople.org/steam/fedora-$releasever/
enabled=1
skip_if_unavailable=1
gpgcheck=0

$ su -l

# yum install steam