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.

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.

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.

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.

Step 3: Enter and move upward
Use the Red Access Key card to unlock this building.

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

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.

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.

What the Dr. Diaz Key Card unlocks
| Unlock type | Description |
|---|---|
| Card overrides | Grants access to locked endgame satellite systems |
| Blueprint access | Enables retrieval of endgame schematics |
| POI completion | Completes 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.
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