STEAM_RUNTIME is an environment variable you can set to select if you want to use or not the Steam runtime libraries. In your case, if you didn't set STEAM_RUNTIME manually, it shouldn't be your problem.
When you say you "got the steam_latest.deb installed correctly", do you mean that you installed steam from Ubuntu Software Center, that you downloaded it from the Steam website or that you manually downloaded steam_latest.deb from somewhere and then installed it?
From what I can tell, libudev0 is not available on Ubuntu 14.04 (nor Kubuntu) and it would have been removed since Ubuntu 13.04. There seems to be a workaround by installing libdev1 and then symlinking it to mimic libdev0. Look completly at the bottom of the page: https://github.com/nwjs/nw.js/wiki/The-solution-of-lacking-libudev.so.0
Hello @yohanleafheart, are you still experiencing an issue on an up to date system?
Closing pending feedback.
Nothing extracted yet.
Hey guys,
I just installed steam on my Kubuntu 14.04 machine. Got the steam_latest.deb installed correctly, but when I run it I'm getting a package problem.
I searched the issues and I saw some talk about STEAM_RUNTIME but I couldn't find how to install it.