A train you build from nothing
OxyRail drops you into an open world where oxygen is scarce and you start with nothing. You chop trees, mine ore, and gather resources to build and expand your own train, carriage by carriage. Each carriage has a job of its own, so the shape of your train is a design problem as much as a survival one. Alongside the building, you keep everyone alive: plant seeds in soil pots, raise chickens, fish in lakes and oceans, cook meals for buffs, and fight off hostile creatures and oxygen bandits. Research at the research table unlocks new tech and items, and better tech makes life on board easier, up to light automation. The world itself is varied — snowfields, grasslands, deserts, islands, berry forests, farmlands and volcanoes, each holding special resources you will want for life and operations on the train.
Playing together
OxyRail supports online co-op, so you and your friends can share one train kingdom. Everyone can take a role: someone runs ahead to scout new terrain, someone works the farm and fish cutting station, someone mans the cannons and heavy crossbows when bandits come calling. The store text makes clear that co-op is not purely cooperative — you can race a friend to the top of a mountain, hold a fishing competition, steal the train and leave them chasing, or drink all the water on board and watch them pass out from thirst. Trading with bandit merchants gives you Oxygen Coins to spend on supplies, which gives the group something to argue over when it comes time to spend them. There is also room for downtime: a friend plays the makeshift piano, you pick up a guitar, someone beats a drum.
Before you start
This is Early Access, so expect systems to still be settling. The oxygen problem is the core loop — you constantly search for oxygen sources or push research until you solve it outright, which eventually frees your players, plants and animals from deprivation. Combat is a real part of the game: unlock clothing and armor, craft stronger weapons, and upgrade vehicle-mounted weapons to defend the train. Food matters — ingredients can be eaten raw, grilled or cooked, cooked dishes give buffs, and recipes have to be found before you can make them. Note that the store text gives conflicting co-op player counts, listing both 1–16 and 1–8 in different places, so check in-game before you plan a big session.