Would any of these be useful to you? If you clarify what you meant by “piece,” I can give you a focused, helpful response.
While GOG Galaxy is available for managing updates and achievements, it is entirely optional. You can launch the game directly from its executable without any background storefront apps. Multiplayer and Crossplay No Mans Sky-GOG
If you are a collector, a digital rights activist, or simply someone who lives in an area with spotty internet, is the definitive edition. You lose minor convenience (auto-updates, Steam achievements) and gain absolute control over your 10+ gigabyte journey to the center of the galaxy. Would any of these be useful to you