There's an Aztec city building game called Tlatoani. It's in early access, but has enough meat on the bone that it's one of my goto games.
Out of curiosity I checked Steam DB for active player numbers. I have discovered at any given point I am 10% to 25% of the given player base BY MYSELF. I am 1 of 4 people playing this game right now in the world. With the prevalence of the internet I always assume whatever weird bullshit you're into there's at least a thousand people talking about it; making memes outsiders could never comprehend. It's actually novel to fly under the radar for once.
What do you do that doesn't have a community associated with it?
Edited a bunch in. Would be interested in your Minecraft thoughts after reading that. I don't immediately see that Minecraft specifically would be useful for climate change. I'm a climate scientist, but I haven't played the game... There are a few other games out there that do tackle climate change, some in useful and interesting ways.
Edit: some of the games I know:
Daybreak by Matt Leacock et al.
Hack the Planet
there's heaps of solarpunk and climate games on itch.io, I havent tried many yet.