I don't want people to give big lists of everything they want. It's so much more telling when people are limited to listing the one thing they want MOST. However, if you are just BURSTING to mention other games...if it's making you squirm not to be able to mention or talk about them...put them under a spoiler cut afterwards and only name your top priority at first. Pretty please.
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I didn't bring this up because choosing one game is easy for me, or anything. I've had to sit and think about this for a while, and for me my dream game has to be in the realm of things that are possible, because I can't be a pure dreamer...that has to be at least a sliver of a chance it'll actually happen, or there's no point in thinking about it. If there's no hope, it'd just be depressing to think about, not exciting. Imo, anyway!
I've decided that game for me that might actually make me cry if it got announced would be a Xenoblade Chronicles X port to Switch. Or the Switch successor, if it's really not possible to make the shift to a console that only uses one screen. Now that may sound weird, that I'd opt for a port! And it's true that I desperately want to be able to keep playing this even after my Wii U has bitten the dust, which could happen at any time, now, and that alone would make me really happy...to know I could keep playing it for another 5+ years beyond where I feel it'll probably become impossible as things are right now.
But the trick here is that until XCX gets ported, I don't think there is any hope of a sequel. And if you haven't played it you won't understand this, but XCX did something odd at the very, very end, that made it clear that there was more story to be had, though not at all clear where that story connected, if it connected at all. They obviously had another, probably even BIGGER story hiding behind the one we got in XCX, the only game that ever successfully made me fall in love with an avatar character. I want XCX2 for the story continuation, but also because XCX has been the absolute BEST game of exploration I have ever played. Yes...better than Breath of the Wild. I've already run and leapt across Mira for 500+ hours, but I could put in another 500 and probably still not have 100% completion in finding every bit of archaeology, technology, or biological troves. And I love the music and the graphics so much, so it's freaking delightful, guys. I want another world like that to live in, on a system that is current and reliable, unlike my poor, shoddy Wii U.
And I think it's hopeless unless we get a port of XCX, first, to expose more people to the first game, so that's why my vote is going to a port, of all things. Unless maybe they make XCX2's story more independent of anything in XCX, which they could! Maybe it was just a teaser.
My honorable mention, that I was hard pressed to rank a hair below XCX, goes to...