myconv: This game?
https://store.steampowered.com/app/33900/Arma_2/
I wonder why it would be pulled from GoG sales(clearly still available for download for those who already own it) If it's concerns over piracy, that ships probably long since sailed.
They used to use Gamespy for multiplayer, but then Gamespy shut down and BI reworked the games to use Steamworks instead so they were removed from sale on GOG.
HypersomniacLive: Speaking of which, I have a pretty noob question - is it better to install Linux on the same HDD as Windows, or to have them installed on separate HDDs?
Either way will work, but I recommend having them installed on separate drives for simplicity/easier setup and to reduce the likelihood of issues (Windows has a habit of getting rid of the bootloaders it finds for other operating systems).
Dogmaus: I have been an Ubuntu user for many years, even though I'm using only W10 on a laptop currently. I miss Linux very much, despite having more choice for games now. Oh Wine, what memories. :)
It's not that much more choice now - in addition to there being more native Linux games now, Wine has come a *very* long way, especially with DXVK/D9VK and FAudio plus all the various clients/tools etc for ease of use :)
Paradoks: Thanks for the answer. I partially figured out what the problem was - secure boot.
Secure boot is a major PITA :/ It's best to just keep it disabled IMO.
https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface#Secure_boot_2