Apart from the first Legend of Zelda which invented the series, 1991's A Link to the Past is definitely the most influential game on the direction the series would take. It set multiple precedents and trends for the series including music, characters, concepts, and especially the classic dungeon exploration gameplay loop that veteran Zelda fans were missing in Breath of the Wild and Tears of the Kingdom.
Source：https://www.cbr.com/legend-of-zelda-link-past-remake-redefine-franchise/
