If reading Dutch isn't a problem for you, or using google translate, then you can find a very detailed walkthrough for the games The Five Cores and Roonshehv Netarra on my site at www.pcgameswalkthroughs.nl
I made the Five Cores walkthrough in 2014 and Dick did the Roonsehv walkthrough in 2015
I saw a question here about how to save your game in The Five Cores, but I can't find that question anymore. But you can save your game by pressing your Escape key and then click on Save. There are only 3 save slots in witch you can save your game. So if you save more then 3 times, you'll have to overwrite your previous save slot. The game runs on the Unreal Engine
I've played the Five Cores in 2014, 2015 and 2016, all 3 times with Windows 8.1 (updated)and I had no troubles with it. I've payed the price for it, so I'm wandering...can I get my money back, now the game is freeware?