The end of the story, what Continue does, and the last two trophies: a fully grown Terrarium and every skill.
The story ends here, and the save carries on after it. Two trophies can still be open: Green Thumb, because the plants need time, and Feel the Force, because the last skills may need more XP. If you have followed the route, these two should finish the list; the notes below cover a chest or a scan that is still short.
The CreditsHidden spoiler – activate to revealEndingMajor spoiler
Location
Mantis · Stinger Mantis – There is nothing left to do but watch. Cal makes his final choice about the holocron aboard the Mantis, and the credits roll.
When the credits are over, choose Continue. Don't start New Journey or New Journey+ to finish anything: those are new games, and this save is the one that needs the trophies. Continue puts Cal back on the Mantis at a point just before the final mission, and the story can't be played through again on this save. Every planet on the Holotable can be visited, so anything still unticked on Bogano, Zeffo, Kashyyyk, Dathomir or Ilum is still there. Bracca, Ordo Eris and the Fortress are not offered.
Recon chest still shut?
If the mud slide couldn't be re-entered and the Recon chest is still open on your list, Collector is waiting on it. Land on Kashyyyk and walk through the Imperial Refinery and Overgrown Pass to the Kyyyalstaad Falls zipline, then from the Basin through Gloomroot Hollow, Origin Lake and the Shadowlands to the Deserted Village Meditation Point. Bounce off the two Lung Plants, Wall Run to the round platform, drop onto the slide to the right of the bridges and use Jedi Flip off its end. This has been done after the story, and no other way to the chest is recorded.
Data Collector still open?
Open the Tactical Guide to see which entry is missing. For a Haxion Brood type, go back to where hunters have turned up before, such as old boss arenas, the Nightmare Ruins and Hermit's Abode on Bogano. No report says whether they still come after the credits, so an ambush can't be promised: keep an eye out while you farm XP. For Scan: Electrohammer Purge Trooper, try Zeffo's Ice Caves first, the nearer trip, then rest at the Deserted Village Meditation Point on Kashyyyk and look on the round platform. He isn't certain to be at either after the credits. Kill on flat ground and scan the body at once. Don't count on Meditation Training for this, because nothing says its fights add entries.
Green ThumbAchievement
Location
Mantis · Stinger Mantis – Continue leaves you on the Mantis, so go to the Terrarium and interact with it. The trophy only pops when you do this with all 10 plants fully grown. If any is still growing, leave this unticked, go on to Feel the Force and look again the next time you are aboard.
Plants need time in the game, so the XP farm below may finish them for you. If one still stalls, fly to Bogano, rest at the first Meditation Point, quit to the main menu, choose Continue and walk back to the ship, then do the same once more. Leaving the game running for a few hours has also worked.
Other places to farm XP
Enemies come back when you rest at a Meditation Point, apart from the four Legendary Beasts, so any group beside one will do. Good ones are the three Oggdos at the Abandoned Workshop on Bogano, the Stormtroopers in Zeffo's Abandoned Village and the spiders in the Imperial Refinery on Kashyyyk. If Cal dies, get back to the spot to recover the XP he dropped. Kills in Meditation Training pay no XP.
Feel the ForceHidden spoiler – activate to revealAchievementMinor spoiler
Location
Mantis · Any Meditation Point – Open the skill tree at any Meditation Point and buy what is left; the last skill pops it. For XP, take the left path from the Dathomir Landing Pad to the Tomb of Kujet Meditation Point and squeeze through the narrow gap. Two Lesser Nydaks are on the far side and can't reach Cal on the stairs, so kill them from there, go back, rest and repeat.
That is the whole list. On PlayStation the Platinum, A New Hope, pops by itself with your last trophy. What follows is an optional appendix that doesn't change your percentage.