hannibal.tx: The Cloud loses things, and when I played Witcher 3 on Steam several times I realized that after playing it offline two more times that a lot of detail was left out of the Cloud saved games. The Cloud is neither as secure or reliable as the server farm owners would like you to think.
If any of you can tell me if there is a bootstrapper for this game that I can create a desktop shortcut to play the game offline you will have my eternal gratitude. Steam does this and it would be nice if GoG would do this also. GoG seems to be more professional than Steam and this would save them a lot of time trying to sync saves when people have high capacity hard drives. The content is truly more robust when you save it to your own drive.
so far one can download offline installers for owned games on gog. so after download, one can install a game offline. this may gets removed by gog very soon, as they try to become more steamlike. but anyway, if a installed gog game is really playable, is today like playing russian roulette with an fully loaded assault rifle. the games are bugged, unupdated, broken and/or abandoned compared to the counterparts on steam, etc. so just buy your games elsewhere, buying here is like burning money.