Like a European setting, countries are at war... there were racism involved too. But the sniper lady was so good. Also, if you have anything similar, you may recommend that too. Thanks!
Hyoufuu no Kolkka, maybe? As for recommendation, if you don't mind a bit of fantasy/magic setting: Youjo Senki, Manuke FPS & Magic Bullet in Magic Land Else: Golgo 13, Gunsmith Cats, Hellsing, Black Lagoon, SAO Alternative: GGO, Dendrobates & City Hunter