All open-world activities are still completely accessible. You can return to all areas, can still do all Quests, Treasure Hunts, Collectibles, Military Targets etc. Free-Roam / Level Select after Story?: Yes, there’s free-roam after the story.You’d have to manually upload/download your save before every individual trophy and redo the last part that triggers the trophy. However, this doesn’t autopop any trophies. Then on the other version click New Game in Title Screen and click the Download icon next to a save slot. You can transfer your save by clicking “New Game” in Title Screen and clicking the Upload icon next to it. PS4/PS5 Autopop & Save Transfer: No Autopop available.Does difficulty affect trophies?: No, can do everything on easy difficulty.Number of semi-missable trophies: 2 – Ninjerilla, Didn’t See That Coming! (can’t reset all FND Bases at once, see their trophy descriptions for workaroud).Number of missable trophies: 1 – Hidden In Plain Sight (no longer possible after end of story).