In the year 2021, after years of seclusion underground, humanity emerges onto the surface, propelled by the development of groundbreaking new technology. Decades of catastrophic fallout from a nuclear disaster during the Cold War have laid waste to the known world, compelling civilization to seek shelter beneath the earth. The pressing task now is the construction of regenerators, which will generate new habitats to facilitate the resurgence of life and the reclamation of the Earth. A world brimming with hope awaits aboveground.

Phoenix New Horizon is a Euro-style board game in which players assume control of a team of commandos tasked with the mission of recolonizing Earth. Throughout the game's four rounds, players accumulate victory points by constructing regenerators and buildings, bolstering the planet's population, and achieving diverse objectives that vary between playthroughs.

Players must adeptly allocate their commandos to various actions throughout the game while also specializing them to enable more potent abilities at the expenses of versatility. Fulfilling missions assigned by the governing authorities yields additional actions on a player's turn.