To ensure you have the most secure and up-to-date version (which is now well beyond v3.99), use these official platforms: No Man's Sky

While is not a free-to-play game, it is famous for providing all of its massive content updates and "DLC" at no additional cost once you own the base game. Version 3.99 was a specific patch released in August 2022 as part of the Endurance update cycle, primarily focusing on freighter improvements and bug fixes. The "Free DLC" Model

Significant planetary generation and settlement updates. Key Features of Update 3.99

Overhauled freighters with organic frigates and bridge upgrades. Beyond: Added full VR support and expanded multiplayer.

Unlike most modern titles, No Man’s Sky does not sell individual expansion packs. When you purchase the game from official retailers like Steam or the PlayStation Store, you automatically receive every major update ever released, including:

Added new glass freighter stairs and refined internal wall placement.