In G.I. Joe War On Cobra there are different types of resources you can collect for different functions. Oil and Intel are used to upgrade the buildings in your base. Minerals are used to Resupply and Recharge your units and expand your World Map. Credits are used to upgrade your units. Aside from collecting them in battles the buildings in your base can generate Oil, Minerals, and Intel. Credits are received from your Credits Delivery Boat and from opening Cargo.