Here is everything I have done so far for chrome os 69.
sudo apt-get install wget
Then:
sudo wget http://launchpadlibrarian.net/161405671/libglew1.10_1.10.0-3_amd64.deb
sudo dpkg -i libglew1.10_1.10.0-3_amd64.deb
Then:
sudo apt-get install software-properties-common
Then:
sudo apt-get install gnupg2
Then:
echo "deb http://ppa.launchpad.net/hikariknight/unix-runescape-client/ubuntu zesty main" | sudo tee -a /etc/apt/sources.list
Hit enter, then:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 9BA73CFA
Then:
sudo apt-get update && sudo apt-get install unix-runescape-client
After this there was a long long long list of code. The launcher downloaded, it started, went through the update process, when it got to the login screen that input boxes wouldn't appear, and the screen "fuzzed" like an old television set every once in awhile.
Old school would work, however.
27-Sep-2018 19:15:01