New game, new codebase, same universe.
True Abstraction: Forbidden is a direct continuation of True Abstraction: Rewind So:
I recommend playing True Abstraction: Rewind first since it's essencially the "part one".
One important thing to note: Rewind has more and better puzzle levels, and Forbidden is more focused at expanding the world itself without as many or hard puzzles.
Last note: This project is made by a single person. Me. It may fall a bit short compared to Rewind in some cases but overall it's much better structured game. If you want to stay more up to date, join our Discord server.
And see you soon!