You can purchase the complete edition on platforms like GOG , Epic Games Store , and the Microsoft Store.
A comprehensive demo is available on Steam and other storefronts. It was recently updated (v1.9.6) to include all the modern UI and balance improvements found in the full game. Against the Storm Free Download (v0.39.3e)
New content like the Nightwatchers expansion and the Keepers of the Stone DLC have added entire new species and biomes. Official Ways to Play You can purchase the complete edition on platforms