Bosses drop critical items like keycards and documents needed for progression [20].
Found in the Hell difficulty Hospital, he uses an LMG. Defeating him is the best way to acquire your own machine gun [18]. Night RaidersHD
The core gameplay involves raiding maps for loot and extracting before you are overwhelmed. Bosses drop critical items like keycards and documents
Knowledge of the environment is your best weapon. Learn where specific "strange blobs" of shadow usually are to spot enemies quickly. Night RaidersHD
Black keycards (dropped by bosses or rarely sold by the black marketer) unlock barracks with high-tier weapons and attachments [8].