Scrap

Scrap is the main resource in the game. It is basically anything useful you might find around in the ruins.

Collecting scrap is easy: just move around with your GPS turned on and the Enklave application running. The best results are at walking speed; if you move faster (e.g. by car), the amount of scrap you collect diminishes.

You can use scrap to craft other items, namely bricks and cells. The process is described on the Crafting screen page.