I have Windows 10, 64bit, my GoG folder is in a secondary HDD (D:\). Still plenty of space and I've installed games such as Final Liberation and Syndicate in the same spot. Beyond saying installation failed, I have specific information or reason for the failure to install.

Same here. All I get is "Installation Broken" in Galaxy, and no explanation whatsoever :/

Same. I had it installed at one point and played a level, then I guess uninstalled it at some points. Now that I want to reinstall, "Broken"

Same here...the
funny thing is it uninstalled itself and then reported broken installation after i tryed to install it again

Galaxy appears to be glitchy with installations lately. Try using the installers from the website instead.

I did end up downloading and installing the game from the site and it seems to be a problem with the destination folder being too long. So doing d:\ would be fine but D:\Random Folder\Games Folder\Another Folder\GoG Folder\Games\Folder\Chaos Gate would be too long.