>>347179972
>>347180114
Yes there are missions and a storyline, but I'm not sure they've implemented them yet in the 2.0 overhaul yet.
In 1.0 it revolves around some nasty kawaii-ass russian college girl and her ghost statues.

As-is you kill things, fetch objects, take photos for eggheads, and navigate anomaly minefields. 
You get paid with money which is what fuels your ammo/equipment/gun collection.