Not many people know this, but the original villain of the Friday the 13th franchise was actually Jason’s mother -- Pamela Voorhees. Mrs. Voorhees appeared in the first film from 1980, where a character named Alice Hardy beheads her.
In the same movie Jason created an altar in honor of his mother, and put her head and clothes on it. This scene has become so iconic that the developers had to include it in the game as well.
Image source: G7 Games