I originally played IXION as a demo and was immediately impressed. The atmosphere and building mechanics were really engaging and I hung on until full release. It wasn't that well received due to lack of difficulty options and bugs, but it's had a ton of work done on it since then. If you enjoyed Frostpunk, you'll probably like this. Personally, the amount of micromanaging and lack of QoL features stopped me from playing past the first chapter.