https://www.powerpyx.com/ghost-of-ts...list-revealed/

As is custom with Sony’s first party trophy lists, there are no difficulty-related trophies to be found in Ghost of Tsushima. The list is completion-based: finishing the story, doing all Tales (Quests), liberating all Occupied Areas, and finding several types of Collectibles including Lighthouses, Shinto Shrines, Hidden Altars, a Pillar of Honor, Records, Mongol Artifacts, Hot Springs, Haiku, Inari Shrines, and Bamboo Strikes. There’s also a handful of miscellaneous trophies such as dressing up in a thief costume. This platinum should be obtainable for players of all skill levels.