Red Keycard

Red Keycard is a required object used to open doors with a red keycard lock. Elite crates start to spawn in red puzzle rooms. However, you will have to start to pull guns out as these red puzzle rooms are always guarded. It can be obtained in the Water Treatment Plant, Airfield, Power Plant, and Trainyard. They are located on the desks. It can then be used on: - Military Tunnels (requires an electric fuse, a blue keycard and a red keycard, the green keycard is optional as it only unlocks another path into the monument. You will encounter scientists that throw F1 Grenades, so prepare medical items and weapons) - Launch Site (requires 2 electric fuses, a green keycard and a red keycard. You will only encounter Bradley APC, which is not a big problem if you hide from it. Do bring medical items as the radiation inside the building is very high, your hazmat suit will decrease the radiation poisoning but not all) - Small / Large Oil Rig (requires a red keycard, but in Small Oil Rig, bring a blue keycard to get to the red puzzle door. You will encounter scientists as well as heavy scientists (if you hack the locked crate), bring medical items and weapons) - Underwater Labs (requires an electric fuse and a red keycard)