What to know

  • The Dr. Diaz Key Card is the second Blue Key Card in the satellite access chain
  • You must already have the Dr. Ellis Key Card to reach it
  • It is located inside a blue building on the opposite side of the satellite complex
  • The card sits on the top floor of the second blue building

After securing the Redleaf Override Access Card and the Dr. Ellis Key Card, the next step at the Satellite Point of Interest in Star Rupture is locating the Dr. Diaz Key Card. This card is positioned deeper into the satellite layout and is intended to be found last before full endgame blueprint access opens up.

Identifying the blue building area

Once you have the Dr. Ellis Key Card, shift your focus to the opposite side of the satellite complex. This area contains multiple blue-colored buildings that were previously locked or inaccessible.

Blue building (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)

The blue buildings are visually distinct, using cooler-toned panels compared to the red structure used for the Ellis card. You’re looking for the second blue building in this section, not the first one you encounter.

Satellite POI StarRupture (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)

How to find the Dr. Diaz Key Card

Step 1: Head to the blue building section

From the central satellite area, move toward the far side of the complex where the blue buildings are clustered. Make sure the Dr. Ellis Key Card is in your inventory.

Locate the Blue building (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)
Step 2: Locate the second blue building

Ignore the first blue building you see and continue to the next one in sequence. This is the structure that contains the Dr. Diaz Key Card.

Head into Blue building (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)
Step 3: Enter and move upward

Use the Red Access Key card to unlock this building.

Use access card (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)

Once inside, look for stairs or internal access leading to the upper level. The card is not on the ground floor.

Move to the top floor (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)
Step 4: Reach the top floor

Climb to the top floor of the building. The Dr. Diaz Key Card is placed in an open, visible spot.

Get Dr. Diaz Security Clearance Card (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)

Pick up the card immediately and avoid having to re-clear the area later.

Interior layout and difficulty expectations

Compared to the earlier key card locations, the blue buildings may involve more vertical movement and slightly tighter interior spaces. However, the Dr. Diaz Key Card itself is easy to spot once you reach the correct floor.

There are no special puzzles or timed interactions tied directly to collecting the card, reinforcing its role as a progression checkpoint rather than a challenge gate.

Interior of the Blue building (Image credit: Creepy Jar | Via: YouTube - SiNKiLLeR)

What the Dr. Diaz Key Card unlocks

Unlock typeDescription
Card overridesGrants access to locked endgame satellite systems
Blueprint accessEnables retrieval of endgame schematics
POI completionCompletes the satellite key card sequence

Common mistakes to avoid

  • Searching the first blue building instead of the second
  • Staying on the ground floor and missing the upper level
  • Attempting the area without the Dr. Ellis Key Card

StarRupture’s satellite progression is deliberately linear. The Dr. Diaz Key Card confirms that you’ve explored the entire POI as intended, ensuring that no endgame systems are accessed prematurely. Once collected, the satellite effectively shifts from a locked location to a full endgame hub.


Thanks for reading the Dr. Diaz Key Card guide for StarRupture all the way through. If it improved your understanding or helped you complete something, let us know below. You can also ask any follow-up questions—we enjoy interacting with readers and are always happy to provide further clarification.