Xenoblade Chronicles X
One of my favourite games of all time, period.
One of the best concept games of all time (IMO). You're in a city from Earth that has landed on an alien planet, and your goal is to help the city survive and thrive. At first, you join a guild that has a specific role (Example: surveyors of the planet, or a defender against hostile xenos, or a mediator that resolves problems in the city), then you start expanding your scope in the operation, becoming a major importer/exporter of materials from the planet, and creating new goods and services based on the new resources. The City (New LA) grows as the game continues (and this city is massive, on the scale of Novigrad from The Witcher 3) - opening up more stories. And since it's the team from Monolithsoft, all sorts of great Xenogears technology and themes make their appearance in this game. The world is massive, five continents, each one roughly the size of the entire world of Xenoblade Chronicles (Wii) combined, each one more alien and magnificent than the last.
(I wanted to add something about New LA and Planet Mira: the city is massive! Think of one of those GTA-type games where you have the whole city, and then a massive alien world bigger than Breath of the Wild surrounding it!)
There are a lot of political themes as well, particularly economic. Who actually runs the city without the governments of Earth around? What about all the alien immigrants who are now moving into the city and opening up businesses of their own? And, also... war! Without spoiling too much, there is a central MacGuffin in the game, something called the "Lifehold" which government desperately needs, and everyone is looking for - also trying to find the Lifehold is an outside alien antagonist known as the Ganglion.
This game differs from the other Xenoblade games (and even more so from the Xenosaga games, which were strictly linear) and goes with an open world style that many were made familiar with in Breath of the Wild. Think of it as a whole lot of short stories (perhaps several hundred) that weave into the greater whole - although, unlike Breath of the Wild, there are chapter book ends that give the game some semblance of forward momentum that will remain the same for every player (whereas Breath of the Wild has an even more open world approach leaving only the beginning and the end). And, speaking of Breath of the Wild, this game acts as a bit of a blueprint for the things to come. It's a far more obscure game, but one of the most imaginatively inspiring games I've ever played.
A bit of a taste of Planet Mira:
(My runner up of games not yet nominated would be Super Mario Galaxy, hoping someone else picks that one! There are still a lot of great games missing)
I describe myself as a little dose of toxic masculinity.
