Climate Zones

For the first time in the series, Transport Fever 3 ships a fully-featured sub-arctic region. Each climate has unique biomes, terrain types, and challenges that demand different routing and cargo strategies. The same factory does not produce the same output everywhere: a steelworks in a temperate valley and the same steelworks in an arid basin behave differently, and a layout can satisfy every industry requirement on paper while still failing because the terrain underneath was never checked. The multipliers below are the game's own rather than an estimate, which matters more than it sounds - a zone that looks generous on paper can come out net negative once distance and terrain cost are added, and the difference is often one tile of the wrong biome. Verify the zone before placing concrete, not after. For what the industries behind these zones consume and produce, see Industries; for the placement rules that decide whether a building is allowed on a tile at all, see Mechanics. The zones are not decoration: they change which outputs are available, so a supply chain that looks complete on a flat temperate map can have no valid source for one of its inputs once terrain forces the route through another zone. Reading the zone list before laying out a map is far faster than discovering the problem mid-build.