Successfully complete one of the following tasks to change the main menu background to the corresponding image:

Jin's Hand: Have a character reach the "Tekken Lord" rank.

Devil Jin's Hand: Have three characters reach the "Tekken Lord" rank.

Alternating background: Have four characters reach the "Tekken Lord" rank. The background will change each day to Kazuya's Hand, Jin's Hand, Devil Jin's Hand, and Jinpachi.