I’m an experienced Linux user, but am fairly new to gaming on Linux. I recently installed Steam in Linux and have been enjoying some native/Proton games/demos. I more recently bought Assassin’s Creed II on Steam but couldn’t get it working through Steam directly (the same “cannot retrieve a license key” issue others have been having). But I read that people have had success with Lutris…
I installed Lutris (and Wine) and have successfully installed ACII in Lutris using the Windows Steam version. UPlay works and retrieves the key correctly, and the game actually starts, but within a few seconds it closes again (and then I have to press the ‘Stop’ button in Lutris in order to close UPlay and Steam (which are still running)).
Thanks for the assistance @Ferrator. Unfortunately, installing a custom version of Proton doesn’t work - I still get the same “Failed to request product key from Steam” error when trying to launch the game from Linux Steam.
And installing UPlay first through Lutris, then installing/running ACII from there doesn’t work either - it still freezes/closes on the first logo screen.