Feltrite Can Be Used for Upgrades
Rage 2 doesn’t do a very good job of actually explaining how important Feltrite is aside from restoring health, so we’re here to shed some light on the situation.
As you collect Feltrite, you can also put them towards weapon and character upgrades. Just bring up your menu and go to the Nanotrites tab, and you’ll see the full list of superpowers you’ve unlocked so far, as well as options for Constituion, Focus, and Overdrive.
You can spend Feltrite to upgrade any of these stats to give yourself more health or overdrive meter. You’ll need 500 Feltrite for the first upgrade, though, so we recommend hoarding as much of it as possible before committing to an upgrade.
Feltrite can be obtained by killing enemies in Rage 2, and they can also be found in chests around the world. If you spot any Feltrite engines on the ground, you can also destroy them to get more of the resource.