Синяя ключ-карта

The Blue Keycard is an important swipe card that grants players entry into certain Tier 2 and Tier 3 monument puzzle-rooms. It can only be obtained by completing green room puzzles and finding the keycard or by gutting high-tier fish. Monuments requiring a blue keycard for completing the puzzle include – Small Oilrig, Missile Silo, Airfield, Power Plant, Water Treatment Plant, Trainyard and the Arctic Research Base. To gain access to the locked crate at Large Oil Rig, a blue keycard is not needed it just opens a room containing 4 military crates.