Card Key Progression

Navigating the heavily guarded corridors of Zanzibar Land often requires the correct access card. This section will detail the acquisition and usage of each Card Key, ensuring Solid Snake can bypass all locked doors and progress through the facility.

Card Key 1

Acquisition: After infiltrating the base and making your way through the initial areas, you'll find Card Key 1 in the room directly to the west of the main entrance area (the first screen you enter after the jungle). It's typically located on a desk or within a small storage locker.
Usage: This key grants access to basic security doors, primarily found on the first floor of the main building and some initial barracks sections. Look for doors with a single green light indicator.
Strategy: Prioritize obtaining this key early. It unlocks essential pathways and often leads to your first weapon upgrades or useful items like the Binoculars.

Card Key 2

Acquisition: Card Key 2 is obtained after defeating the first boss, Black Color. Once he is neutralized, search the immediate area where the battle took place. The key will be dropped by him or found in a nearby container.
Usage: This key opens doors with two green light indicators, typically leading to the second floor of the main complex, more secure storage rooms, and some laboratory areas.
Strategy: The fight with Black Color can be challenging. Ensure you have sufficient ammunition for your Handgun and consider using Grenades if you have them. Once the fight is over, pick up the key before moving on.

Card Key 3

Acquisition: You'll find Card Key 3 in the research lab section, specifically after solving the puzzle involving the gas-filled room and the scientist. The scientist, Dr. Drago Pettrovich Madnar, will hand it over as a reward for your assistance.
Usage: Card Key 3 is crucial for accessing the deeper research facilities, including the areas where Metal Gear D is being developed. These doors will have three green light indicators.
Strategy: To get this key, you'll need to navigate the gas-filled room. Ensure you have the Gas Mask equipped before entering to avoid taking damage. Follow Dr. Madnar's instructions carefully to complete the sequence and receive the key.

Card Key 4

Acquisition: Card Key 4 is located in the prison block, specifically in one of the cells after you've rescued Holly White. She will direct you to its location, often hidden within a loose brick or a specific locker in her cell or an adjacent one.
Usage: This key unlocks higher-security areas, including some command centers and further sections of the Metal Gear D hangar. Look for doors with four green light indicators.
Strategy: Rescuing Holly involves a bit of stealth and potentially disarming some traps. Once she's safe, speak to her thoroughly to get all the information, including the precise location of Card Key 4.

Card Key 5

Acquisition: Card Key 5 is acquired after defeating the boss fight with Red Blaster. Similar to Black Color, the key will be dropped by him or found in a nearby accessible area immediately following the confrontation.
Usage: This key provides access to the final, most secure areas of the base, including the main control room for Metal Gear D and the path to the final boss. These doors will have five green light indicators.
Strategy: Red Blaster is a formidable opponent. Make sure your weapon inventory is stocked, and consider using any special items you've collected to gain an advantage. After the battle, meticulously search the room for the key.

Card Key 6

Acquisition: Card Key 6 is the final access card and is typically found in the immediate vicinity of the Metal Gear D hangar or the main operations room, often after a significant plot event or puzzle solution. It might be on a console or a defeated enemy.
Usage: This key grants access to the very core of the facility, allowing you to confront Metal Gear D and its pilot. These doors will have six green light indicators.
Strategy: By the time you reach this point, you're in the endgame. Be prepared for a series of intense encounters. The acquisition of Card Key 6 signifies your readiness for the final confrontation.