It simply doesn't have the resources to render large amounts of enemy characters, so when I say that characters popping into view literally next to you I'm not kidding. (wccftech.com)
The weapon can be used during gameplay on enemy characters or civilians. (jamiex66.com)
In one of these games, enemy characters used realistic soldier behaviours, whilst in the other game they did not employ realistic soldier behaviour. (sciencedaily.com)