For questions, comments or feedback, please visit the Achievements and Guide Discussion thread.

In this step, we will be starting the game and recruiting all of the characters while completing 100% of everything possible: collect every treasure chest and hidden item, find every enemy weakness, unlock every skill, master every job, etc. I found this walkthrough to be extremely helpful during this process. I also printed out the chapter-by-chapter portion of this guide which lists all the missable items. Furthermore, I used this google spreadsheet to track my progress. You'll have to make a personal copy in your google drive to be able to actually use it. It's important to track this stuff on your own because the game offers NO tracking for anything in-game. It can be a nightmare later on figuring out what you're missing for an achievement if you don't track it along the way. I spent four hours going back over every location to find three treasure chests, time I could have saved if I properly tracked from the beginning.

Essentially, this is what I would suggest you do, with missables marked in red.

If you are diligent in not missing those few things (four enemies for Strategist, one chest for Treasure Hunter, two items for Collector, and six hidden items for Eagle-Eyed), you should be home free. From there, use the resources I linked above to clear out every town, area, and dungeon to collect everything possible, complete all quests, and fully analyze every enemy. Along the way, continue to max out the jobs and learn all skills.

I personally used the team of Ophelia, Cyrus, Therion, and Olberic for most content. You can mix and match as you'd like, but the four I used and the backup four all have similar Path abilities (Ophelia Guide = Primrose Allure, etc), so you'd want a straight swap rather than having two people with the same ability in the party or you may not be able to do everything needed. However, Therion over Tressa was essential since he's the only one who could open locked chests, and stealing items versus purchasing them was much better in my opinion (though you'll be swimming in money at the end of the game, so anything with a low steal chance, just swap her in and purchase it later).

When thinking about secondary jobs, you can get things that complement the main job or diversify to cover more options. For instance, since I didn't have Tressa on my main team, having someone with the Merchant job was helpful for wind magic and her ability to hire help in combat. Once you get the hidden jobs though, those tend to be better than anything else available.

Step 2: Post-Game Cleanup
After completing all the inidivudal stories, you'll need to finish up every side-quest which includes tackling the end-game dungeon in the Ruins of Hornburg as well as the superboss Galdera. One thing the Neoseeker guide I linked above didn't mention which makes defeating this superboss SO much easier I have mentioned in the accompanying achievement description below. I tried and failed many times on that boss even way overleveled before I added that piece to the strategy.

After defeating this boss, you should get your last item needed for the collection achievement, though there are a few rare ones you may not have come across naturally which I've mentioned below. The accessory you get from the superboss is actually very useful - it will turn off random encounters, which will make collecting any missing items or treasure chests go much more smoothly. At the end of this step, you should only have two regular achievements and the "platinum trophy" achievement left to earn.

Octopath Traveler is an absolutely incredible JRPG. It has all the best tropes, the Path abilities make things unique, and the combat is nearly perfect. With very few missable items, the achievements aren't entirely horrible, but you're in for the long haul time-wise. Sadly the solo/speed run achievements bring the list down a lot, not only because it forces a second playthrough, but those are some of my least favorite challenges ever. Still, can't recommend this game enough, especially if it's still on Game Pass as it was when this guide was written.