I'm trying to run the offline version of Minecraft (which I'm told doesn't need a premium account?) but the "play offline" button is greyed out, with the text underneath it reading "not downloaded".
Do you need a premium account to play offline?
Note: I've also tried using the
assets.minecraft.net/1.8/minecraft.jar but I encounter this (fatal) error:
java: symbol lookup error: /usr/lib/jni/libjinput.so: undefined symbol: EVIOCGUSAGE
I'm also a bit worried that what I'm doing might not be allowed - is the minecraft.jar file from assets.minecraft.net legal?