Frostpunk 2 is a departure from the original - 11 bit studios' co-director explains why
Briefly

Jakub Stokalski, co-director of Frostpunk 2, emphasizes the thematic evolution: 'If you survived the end of the world, the big question becomes, 'What now?'' This reflects the game's shift towards exploring the complexities of creating a new society after survival.
Frostpunk 2 introduces mechanical changes to enrich gameplay, including the use of Unreal Engine for modding and a quicker game scale, changing time metrics to weeks, enhancing strategic decision-making.
Read at Polygon
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