Super Sudokoid: Final Transmission

Here is an excerpt from Super Sudokoid: Final Transmission's description on its official website:

Having barely escaped a space-pirate ambush, your damaged ship all but crash lands on unexplored planet Sudoku-45. With all your equipment scattered after the violent entry, and the ship’s navigation system refusing to work, you have nothing but instinct and puzzle solving skills to get you back home.

Instructions: This is a dynamic, expanding puzzle, consisting of multiple, partially overlapping Sudoku grids. Selecting a cell will update the puzzle description with the rules of that sector.

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 otherwise avoid clicking on covered cells to not get spoiled by undiscovered areas or rules.

Each sector is a complete Sudoku of its own. Areas may overlap, in which case the overlapping parts belong to both sectors, but digits entirely within one sector does not affect digits within other sectors (meaning digits can share a row or column as long as they belong to different puzzles).