If anybody ever bought any games through GamersGate (https://www.gamersgate.com/) back in the day, before they sold Steam, Uplay and Origin keys, I would suggest to check if you are still able to download them. I have been having issues with some of them, and so far the tech support has been unable/unwilling to resolve the issue. If you are able to download the game, I would suggest trying to install it, as that is where I am getting the issue, as installation files turn out to be corrupted.
If you are able to download it and install it, I would suggest backing up the GamersGate temporary files folder, as my first issue was that I could not download the files because there was an issue with their servers housing them (that is my personal diagnosis). This way you wouldn’t need to re-download the files in the future.