In Delta Operation, there are specific ways to obtain D1-3 keys. You can obtain them by completing specific missions, exploring hidden areas, or defeating specific enemies. Pay close attention to the clues and hints in the game, and actively participate in various activities to increase your chances of obtaining D1-3 keys and unlock more exciting content.

How to obtain the d1-3 key

1. Enter the Dam Zero map and go to the left side of the map.

2. On the left side, players can find a small house with a solar panel feature on it.

3. Then on the outside of the house, the player can find the arrow mark, and according to the direction of the mark, the player can find the code number.

4. After finding all 3 password numbers, open the password door of the cabin.

5. After entering the house, you can find the key according to the direction of the arrow.