So today I decided to enable developer mode on my chromebook, download the runescape mobile APK, installed it, and bam Runescape on a chromebook working perfectly. Not sure if it matters from model to model but I am currently using an Acer 15 Chromebook. So please give it a try if you dont want to use crossover or a linux os on your Chromebook. The game works flawlessly. Only reason I am posting here is because I could not find any information on this on google and obviously when you try to install the mobile version from the play store on a chromebook it just doesn't allow you saying it isn't compatible, but that simply isn't true, at least in this case. You do have to find your own osrs apk download file for the most recent version for this to work.