https://www.focus-entmt.com/en/news/atlas-fallen-reign-of-sand-a-new-enhanced-content-packed-free-update-coming-august-6th "
Atlas Fallen: Reign of Sand: a New Enhanced, Content-Packed Free Update coming August 6th! Today, Focus Entertainment and its studio Deck13 Interactive are thrilled to announce that Atlas Fallen, the super-powered action-RPG where you battle legendary creatures in an epic, sand-covered fantasy world is about to get even more epic with the upcoming release of Reign of Sand! This free major update promises to elevate your solo or co-op adventure with a wealth of new content and enhancements, perfect for both returning players and newcomers.
Get a glimpse of the excitement in our latest "
Major Update Announcement" trailer before the launch of Atlas Fallen: Reign of Sand August 6 on all platforms.
A Completely Free Overhaul of Atlas Fallen Deck13's commitment to Atlas Fallen shines through with Reign of Sand, delivering a comprehensive free update that brings an overhaul to a number of gameplay mechanics and core game features along with various pacing and quality of life improvement. Available to all players on PC and consoles, this update is a direct result of the community's valuable feedback.
"Reign of Sand reflects our dedication to keeping Atlas Fallen a dynamic and captivating experience for all players." says Ahmed Boukhelifa, Deputy Chief Executive Officer - PULLUP ENTERTAINMENT STUDIOS. "This free update is a testament to our commitment, offering substantial new content that both returning and new players will enjoy."
New Horizons and Challenges Awaits An expanded world, new enemies, revamped progression, new quests... The world of Atlas Fallen is enriched by this major, entirely free update! Enjoy new voice acting with the talented Ben Starr (Final Fantasy XVI, Warframe), a reworked campaign and face even more formidable creatures armed with 25 new Essence Stones. Persevere in your adventure with the long-awaited "New Game +" and challenge the gods with the new Nyaal's Nightmare difficulty mode. Many more surprises and improvements await you in this content-rich new version!
“Our team was grateful for the opportunity to further develop Atlas Fallen and to bring a vastly updated version to the players. We listened to the feedback and made a whole series of improvements that we hope will make players enjoy the game even more.” says Jan Klose, Creative Director on Atlas Fallen.
Carry your Save or Start Anew Starting August 6, Atlas Fallenevolves into Atlas Fallen: Reign of Sand. As a replacement of the base game, this major, completely free overhaul will be available as an update across all platforms, ensuring that every player, whether they are current, returning or newcomers, can dive into the enhanced version of the game. While you'll be able to carry over the progress you made on your old character like the equipment and the loadout to Reign of Sand, to fully immerse in the breadth of new features and improvements, starting a new playthrough is highly recommended for the optimal experience.
Mark your calendars for August 6 and get ready to explore the improvements and new content of the Reign of Sand free major update on PC and consoles."
I reckon this "complete overhaul" is what's been delaying the GoG release.