An interesting and very neat concept. GOG is working with willing game companies to connect some Steam games to your GOG account.
To connect your library with GOG.com, sign in to your active Steam account via this page. NOTE: Make sure your Steam Privacy Settings & Profile Status are set to public.
You’ll be able to permanently import all the games listed below to your GOG.com library – assuming you own them. The eligible games are limited-time offers made possible by participating developers and publishers, so stay tuned for more games to come.
You can connect only one Steam account with your GOG.com library. This process is permanent – choose wisely!
The nice part is that it doesn’t remove your Steam version, it just gives you the option of downloading it through GOG for future purposes. Which is great if you want DRM free copies. Plus with Steam being a bit dodgy lately it’s nice to have an alternative. GOG and even their Galaxy client are shaping up nicely. It’s already a good place for picking up old games. There’s even a few I have my eyes on, but I’m waiting for a sale first.