These are few steps to get Steam running on Ubuntu:
wget -c media.steampowered.com/client/installer/steam.deb
dpkg -i steam.deb
apt-get install -f
Solutions for some issues
Some time ago I needed 32 bit flash even on 64 bit system - I don’t need it currently but I’m living this as a tip.
apt-get install adobe-flashplugin:i386
After Ubuntu upgrade I was unable to run Steam anymore - It shouted on me with strange “networking problem”. I have to clean Steam configuration with: