Update: I was able to add about 6 or 7 new games to my GOG library thanks to GOG Connect. Pretty neat as they're free goodies such as artwork, manuals (sometimes scans of the original manual that came with the physical PC game), avatars, and full soundtracks in addition to a DRM-free copy of the game (and any rollback versions).
Here's the current list that's available for Connect, though this list may be subject to change in a few days:
- The Witness
- FTL: Faster Than Light
- The Incredible Adventures of Van Helsing: Final Cut
- Galactic Civilizations 3
- Trine Enchanted Edition
- Saints Row 2
- Shadowrun Returns
- The Witcher: Enhanced Edition
- Bit.Trip Runner
- Braid
- Breach & Clear
- Breach & Clear: Deadline
- Broken Sword: Director’s Cut
- Mount & Blade
- Project Zomboid
- Sherlock Holmes: Secret of the Silver Earring
- To The Moon
- Two Worlds
- Unreal Gold
- Unreal Tournament GOTY
- VVVVVV
- Xenonauts