Eliminate one of the bosses

Kill 50 Infantry soldiers

Kill 10 Heavy soldiers

Heal yourself or heal someone else

Obtain all trophies.

Dress up as a legendary thief.

Complete all Hot Springs, Haiku, Inari Shrines, and Bamboo Strikes.

Find and honor all of the Shinto Shrines on Tsushima.

Play the "Lament of the Storm" at a friend's grave.

Purchase an item from the Black and White Dye Merchants.

Liberate the entirety of Tsushima Island.

Fully upgrade your sword.