Is there like gear and stuff to hunt/loot? Or is it just a shooter?
No you loot items form enemies that are down or scavenge for items. As you level up you can acquire or purchase better weapons. You can "craft" items (haven't gotten that far yet). Unlock different abilities as you level up. So far I'm only level 8 or 9 so not that far into it. Others are up to or over level 20 already (must have a lot more time to play games then I do).
I hope that answers your questions.