Super Sudokoid: Dark Inversion

Here is an excerpt from Super Sudokoid: Dark Inversion's description on its official website:

While cruising through hyperspace, as one does on occasion, your radio suddenly picks up a distress signal from a nearby solar system. The planet it originates from isn't on your star chart, but your ship's computer is adamant that this is none other than the lost home world of the ancient Puzzlo race, known for their penchant for intricate puzzle, and deadly super-weapons. With trepidation, you set course to land.

Instructions: This is a dynamic, expanding puzzle, consisting of 16 sectors in a 4x4 grid. More cells, rules and story segments will be revealed as you play.

Most of the grid is covered in fog. By correctly placing digits, the fog may be lifted. You may place digits in the fog if you know what they are, but avoid guessing.

Each sector is a complete and separate 9x9, regular shape Sudoku. Sudoku rules applies independently to each sector, so a digit in one sector doesn't affect cells in other sectors. Other rules may span multiple sectors and DO affect all involved cells.