Does not run out of the box on Slackware-current. I'm too lazy to tinker with it now. But when game has Linux support tag its only very rare occassions that it's meant to be some premade windows installation meant to be run with wine. I might slightly adjust the rating some time in future when I'll have some time to tinker with it.
wine-5.18 (Staging) The original one (non HD) I secretly installed on school IT class computers, and there were some very delighted nerds about it. It is really good RTS especially in LAN parties. works fine with fullHD resolution.
Using wine-5.18 (Staging), just have to chose software rendering support, to get full HD resolution. This is one of those games from my childhood that nobody else I know, but me, played. It was very scary for me, never finished it. Gonna catch up on this now.
Developer seems to have abandoned GOG version because, on steam its not DRM free, which makes you buy more than one copy to play in coop, so its only natural that some indie developers turns to bad ways of bad companies. This version is also the only game that I bought on GOG that does not run on Slackware current via wine. I recommend not to buy this in its current state and not to support this developer.