It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

I downloaded and launched the game. It hits the 90% mark on the initial loading screen and then hangs. I need to kill -9 it.

I found the different flags.

-o (force-opengl) gets past the initial loading screen. It gets to 100% on Establishing Satellite Connection and then I get a black screen an nothing ever happens. I need to kill -9 it.

-s (force-glcore) gets through the initial loading screen but then hangs at 52% on the Establishing Satellite Connection screen. I have to kill -9 it.

Where does it log to? Nothing comes out of stdout/stderr. I get "Importing game controller configs" and that's the last thing printed to the terminal.

Ubuntu 17.04 x86_64:

Linux deepthought 4.10.0-33-generic #37-Ubuntu SMP Fri Aug 11 10:55:28 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

GTX 1080:

81:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1080] (rev a1)
81:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller (rev a1)

Latest nVidia drivers:

ii nvidia-375 375.66-0ubuntu0.17.04.1 amd64 NVIDIA binary driver - version 375.66

Latest SR:

wonko@deepthought:~/GOG Games/Satellite Reign$ cat gameinfo
Satellite Reign