Unlike most other IO online free games, in this one, you won’t find yourself in a too crowded place. Yes, there are many objects on the map, like shelters, where one can find guns and ammo, or trees and rocks, behind which you can hide. But under-crowding is, probably, a good thing – because otherwise, there were too many kills, leaving not so much space for playing itself.
The goal here is to kill as many opponents as possible while you’re alive. Most likely, you will be killed (eventually) but it is in your hands to take as many enemies with you as you still can. After being killed, you respawn and things start over.
To make it more fun to play, you can throw grenades to others (so can they), hind, roam around, and change your weapons.