Required for Platinum → counts toward the bar
conseilHelpful but not mandatory → doesn't count
50 trophies split into 1 Platinum, 1 Gold, 16 Silver and 32 Bronze, none of them online.
Expect 40-50h for the Platinum playing normally, 30-40h with Assist Mode enabled. Estimated difficulty: 4/10 (3/10 with Assist Mode).
Only one trophy is semi-missable, "Be What You Want to Be" (see the Story tab), and it stays recoverable via the game's permanent saves: this is not a true point of no return.
Assist Mode (Settings > Options > Assist Mode) enables invincibility, one-hit kills, etc. It trivializes combat but doesn't disable any trophy: worth turning on if you want to speed up the Platinum or you're struggling.
New Game+ is available but isn't required for any trophy. The game stays in free-roam after the story, and keeps a permanent save after every Main Quest, acting a bit like a mission select.
Interdimensional Protector (Platinum) — Earn all other trophies.