SBAsset6 is a format used by the game Starbound for packaging together game/mod assets. It appears to be specific to Starbound for the time being, though that may change in the future.
This library was developed to parse and read these files in Javascript; it is based off of the work done by blixt in the excellent py-starbound library.
Please note that this library requires async/await and is heavily promise-driven. Node 7.6+ is required.
Some reverse-engineering documentation is available in the blixt/py-starbound repository.
Ensure you have at least node.js v7.6+, and then...
$ yarn add sbasset6
Reference the documentation.