I went back after completing the main story, as there was still A Lot To Do. Not least completing the story unlocks two more Heroes – the Queens of Agnus and Keves themselves – but also because I had loads of other side missions and stuff I wanted to look into.
There’s quite a lot more exposition on how the world of Aionios came to be, as well as more backstory on both the main characters and all of the Heroes. Completing quests for your characters also eventually leads to them “ascending”, which unlocks more CP levels for them and some bonuses.
There’s a Nopon you meet fairly early on in the game who tells you to come back once you’ve completed the game, so I did that and he wanted stories of my adventures. Each completed story unlocks something – mostly cosmetic items and skins of characters from earlier Xenoblade games – and to complete them generally means 100%ing something. One I thought I’d go for was to unlock everything on everyone’s Interlink skill trees. To do this requires a lot of SP, and the only ways to get SP are by exploring the world (new areas unlock SP), opening containers (which might contain some), beating big ol’ baddies, and completing quests. Ascension quests unlock 10 SP each upon completion, and were the main things left for me to do, so I focussed on them. Oh boy.

Valdi, the young engineer commander of one of the Colonies, has a quest which involves collecting loads of items. Some are very rare. And only seem to come out of the item generators. Sometimes. I spent probably two whole hours on this tiny bit of one part of one of hundreds of quests, eventually completing it when the RNG Gods allowed it. That gave me enough SP to unlock the final bit of an Interlink tree, which in turn let me go and see the Nopon to get my prize. Only, it turns out, that I’d already got the same “prize” by scanning an Amiibo months ago. Angry? I nearly exploded.
I did, however, mop up some more stuff afterwards until I was satisfied I’d managed to rinse as much information and entertainment as I could out of the game, and with 130 hours on the clock, I called it a day.
Fantastic game. I see the remaster of Xenoblade Chronicles X is out now too, but as it has no ties to the 1, 2 or 3 (bar a single character cameo in a secret mode in XC2), I feel sad I won’t see any more of this amazing world. Or rather, set of worlds. Xenoblade 4 soon please and thanks?