Ubisoft actually sells some DRM‐free games on GOG—the first Assassin’s Creed, Far Cry 1 and 2, Rayman Origins (but not Rayman Legends).
If you have disk space to spare, I would recommend downloading GOG’s offline installers as a backup. The risk of the service disappearing or games you’ve bought being removed seems pretty low, but DRM‐free offline installers are just as good as the classic “physical copy,” provided you actually saved them!
> DRM‐free offline installers are just as good as the classic “physical copy,” provided you actually saved them!
Better even as the classic physical copies often had DRM to prevent you from making backups. Not that there weren't workarounds but still, being able to just back them up like any other file is better in my book.
Unfortunately the "if you have disk space" part is not always irrelevant. Would be nicer if we could share that backup space by chunking up the installers into blocks and then advertise via a distributed table of hashes who has which blocks available. Ideally we'd also have a protocol to let these blocks of bits flow from those that have them to those that need them.
If you have disk space to spare, I would recommend downloading GOG’s offline installers as a backup. The risk of the service disappearing or games you’ve bought being removed seems pretty low, but DRM‐free offline installers are just as good as the classic “physical copy,” provided you actually saved them!