You will need the Dead of Winter: A Crossroads Game Base Game to play this expansion.
This expansion is the ultimate experience for Dead of Winter, the quintessential post-apocalyptic game. Warring Colonies comes with a mountain of content, much of which supports the new team variant for 4-11 players, in which two colonies compete over the same locations for limited resources and power. In the Warring Colonies variant, unique main objectives set two colonies against each other as they battle for territory with a new fighting system that includes tactics cards, bullet tokens, and 12-sided combat dice. New and terrible joint-colony crisis cards force cooperation and coercion every round. And the odd-man-out Lone Wolf adds chaotic balance as she pursues her own secret goals while keeping both colonies in check.