First person, mouse to look, and a loadout of a carbine, a pump gun, a sidearm and a rifle on keys one to four. Right button brings the sights up, shift sprints and also steadies a held breath, V switches fire mode, and the yard is a maze of containers, wire and a burnt out truck. The timer starts when you do.
Three minutes is long enough to be methodical for about ninety seconds. The rest is a running argument with your own weapon choice while the count of remaining hostiles refuses to move. Enemies flank, the sightlines through the yard are longer than they look, and the reload you started at the wrong moment is the reason the run ended. One map, one objective, and a very short distance between starting and being good at it.