JudasIscariot: But that's exactly what we do now unless we don't have a version number anywhere in the game or don't receive one from the developer then we just use (gog-<last digit of our installer>).
hummer010: Maybe you do on Windows, but not on Linux you don't. Continuing to use Divinity: Original Sin as the example (The Enhanced Edition):
The website lists the version as 2.0.104.737 (GOG-1). If I click on the link to download it, I get a file named:
gog_divinity_original_sin_enhanced_edition_2.0.0.1.sh
The version in the filename doesn't match the version on the website. If I'm not paying attention, I redownload a 9GB file because 2.0.104.737 > 2.0.0.1.
I've attached screenshots of the game card, and my downloads screen after clicking on the link.
We don't put the game's version in the offline installers' filenames, not on Windows or Linux.