Metal, an important resource in Firefall, is primarily collected by Thumping. Thumping is an on-demand mission where players calldown and defend a Thumper for five minutes while it harvests a deposit. There are eight types of thumpers. During this time creatures and in some cases Chosen and Bandits spawn.
Firefall has four main types of resources, which are collected from activities in the world or purchased via the market. These resources are refined into crafting components, which are combined with Crystite to make gear. This guide covers the different resources, where they're from, and what they turn into when they're refined or salvaged.