King Tut's main accomplishment was saving Egypt from the chaos his father had put it into. Akhenaten had tried to change the religion in Egypt from Amun to Aten. In making this change, he destroyed the temples of other gods. Worship of Amun was forbidden. When Tutankhamen took over he changed the religion back to Amun and rebuilt some of the temples. This helped Egypt regain stability and return things to normal.