The full form of HoMM is Heroes of Might and Magic.
Heroes of Might and Magic is a series of turn-based strategy fantasy games originally developed by New World Computing and later by Ubisoft. The games typically involve players controlling heroes who command armies of mythical creatures to conquer maps and defeat enemies. The series is known for its deep strategic gameplay, engaging storylines, and iconic creature designs. The abbreviation "HoMM" is frequently used by fans to refer to the series and individual games within it.