The premise of the mod is to take the factional warfare aspect of Stalker: Clear Sky and make it the entire focus of the game, rather than a neglected feature.
You can radio in squads with a nice variety of options. It's even posible to micro manage each squad! Doing so may prove to be counterproductive: the zone is full of traps and Death waits around the corner. Not every squad is going to make it to their destination...