Oxygen (v1.025)

Humanity survives beneath a poisoned sky where breathable air is more valuable than any currency. Oxygen is a compact post-apocalyptic city builder centered on an Oxygen Center, a vital machine that draws water from below ground and converts it into the air your settlement needs to live. The setting is bleak without being needlessly grim: survivors gather around the last functioning infrastructure while volcanic pollution, barren land, and violent weather make every expansion feel risky. Its central tension comes from keeping people alive today without locking their future into dirty coal power.

Building a settlement means laying out homes, production sites, storage, farms, water systems, and power infrastructure around the range and demands of the central oxygen facility. Workers need assignments, resources must move through supply chains, and food, water, coal, building materials, and spare capacity all need careful management before the next emergency arrives. Research opens better structures and more efficient options, while confidence and education affect how effectively the population contributes. Scouting abandoned locations brings in supplies and new citizens, but expeditions and growth can leave the town exposed when freezing conditions, droughts, destructive winds, or eruptions disrupt normal production.

What separates Oxygen from a standard peaceful builder is how directly its environmental theme shapes every decision. Coal is an immediate answer to electricity shortages, yet sustainable energy becomes increasingly important because survival depends on creating a stable system rather than endlessly burning through finite reserves. Reviving dead trees adds a small but welcome restoration angle to a world otherwise defined by ecological collapse, and the clean, readable presentation keeps its interlocking systems approachable. Players who enjoy Frostpunk’s pressure-driven survival planning but prefer a less oppressive, more streamlined city-management format find plenty to like here, while newcomers to the genre can learn its basics through a focused loop of expansion, research, stockpiling, and disaster preparation.