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Surviving The Aftermath's tutorials: Episode 2, Resources.
The game features several resources you'll need to build, upgrade and equip your people with. Resources listed below are separate from various Food items, which have their own section. Water and hydration is also an important resource of its own, but works differently from the ones put in boxes. Resources are either scavenged from the colony view, traded, gained from events, created at the various buildings or collected from the world map.
Gathering resources from the world map is handled by specialists. Low-end materials such as Food or Wood can be gathered in larger quantities than items such as different kinds of medication, as they are easier to find in usable condition.
Refining some basic resources can be done immediately but others require researching the Tech Tree further.
Basic resources consist mostly of building materials used throughout the game. They're easy to gather or refine, but have little trade value. Most can be used "as is" or refined further into higher grade resources.
These resources are hard to get but crucial in advancing your colony. They can be found on the world map or traded from societies or received from events. Later on some can be crafted after researching the appropriate structure from the tech tree.