Food, wood, metal, and gas are used for primarily constructing buildings, training troops, and researching. Additionally they are also used for healing troops your troops after fierce battles and for some other minor things.
Resource Types:[]
Ways to acquire resources[]
Collecting them on Resources Buildings
Using Supply crates from your backpack.
Gathering the Resource Tiles
Attacking and plundering other Settlements
Open random crates that you get from recycling items or recycle items to get supply crates.
Killing Infected and rallying Infected Fiends.
Completing Intels
Participating in events
Exchange and receive resources from Market Stall/Supply convoy
You can only obtain Biocaps by earning them in events, purchasing them outright, or getting them as an additional reward from other packs you can purchase. For Gathering a full guide you can click here