STALKER - Went on a mission that sent me into the invisible blood sucker infested town.... at night... I could hear one of them fighting a human on the other side of the town and when i got there i found his body but no blood sucker, dispite this i press on into the town only hearing faint sounds of the blood suckers, then in the middle of the town they all converge on me at once, i could hear them all around me but i couldn't see them.... then suddenly they where on me from 2 sides, so i run like hell only to run into more of them, dodge into a building but hit a dead end and have to fight my way out, totally disorianted at this point i run outside to find another one (only kill 2 of them so far) jump up right in front of me, and finally i run like hell with blood suckers in tow -all the while hoping i don't run into an anomaly- out of the town with no health packs left, very little health and a shortage of ammo.