rjnfc: To achieve a better screen resolution for this game in Windows 10, edit the registry at Computer\HKEY_CLASSES_ROOT\VirtualStore\MACHINE\SOFTWARE\WOW6432Node\Sierra On-Line\Cataclysm by setting screenDepth 32, screenHeight 1080, screenWidth 1920 (with decimal base) or whatever your preferred resolution is. I ran the game before doing this and set it to OpenGL. Credit to /user/markhobsie/ on Reddit.
Yeah or just put this into a .reg file and run it:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Sierra On-Line\Cataclysm]
"HW_Data"="C:\\GOG Games\\Homeworld Emergence"
"HW_Language"="English"
"glToSelect"="opengl32.dll"
"deviceToSelect"=""
"deviceCRC"=dword:18cdede5
"deviceIndex"=dword:00000001
"screenDepth"=dword:00000020
"screenHeight"=dword:00000438
"screenWidth"=dword:00000780
"CmdLine"="/noswddraw /disableAVI"
"deviceCaps"=dword:00000000
"deviceCaps2"=dword:00000000
"d3dToSelect"=""
"D657E436967616D4"=dword:00000000