Signalis: Class 4B Wall Safe Code
The first wall safe that players will encounter in Signalis is in Class 4B on level B1. To get its code, fans of survival horror video games must collect the Aperture Card from the desk drawer in the Observation room on B1. The door to this room is located in the top-left corner of the Corridor that is to the right of Surface Access, and it is opened with the Protektor Key that is in the Aula near Class 4B.
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With the Aperture Card in hand, players should exit the Observation room, and head up until they reach the Library. There is a Microfilm Viewer in this room, which can be used to view a document associated with the Aperture Card. The Class 4B Wall Safe Code can be found on the third page of this document.
Signalis: Office Wall Safe Code (Tree)
The second wall safe in Signalis is in the Office on level B2, and it has a tree inscribed upon it. To open this safe, players should work through the level until they have unlocked the Butterfly Box and earned the ability to tune into radio frequencies.
Once this ability has been obtained, fans of indie horror should turn their attention to the Frequencies document that is found in the Interrogation room above the Northwest Corridor on B2. Players should then use their receiver to tune into the frequency that is associated with “Tree.” This can be done in the menu that is above the Inventory menu, and the Office Wall Safe code will appear in the bottom-left corner after dialing in the correct frequency.
Signalis: Nurse Station Wall Safe Code (Sword)
The final wall safe is in the Nurse Station on level B3, and it has a sword inscribed upon it. The first step toward opening this safe is finding the SWORD document in the Waiting Room with the 5-Lock door, which can be entered from the bottom-left corner of the East Corridor.
With the SWORD document in hand, players should return to the Nurse Station and examine the Wall Safe. Fans of psychological horror should then write down all the letters that appear on the safe’s keypad and compare them against the letters that are visible on the left side of the SWORD document.
Upon completing this process, Signalis players will find that there is one letter from the keypad that does not appear within the SWORD document. Fans will also find that one letter has been obfuscated in the document, and indeed that obfuscated letter is equal to the extra keypad letter.
Players should now use the SWORD document to connect the letters on the left side to the numbers on the right side. This is done by matching up the positions of the letters and numbers. For example, the letter in the top-left corner of the letter section is equal to the number in the top-left corner of the number section. Notably, some numbers in the document will be obfuscated, and fans of sci-fi horror can fill in any gaps simply by following standard counting order.
At this point, players should reference the Frequencies document and use their radio to tune into the frequency associated with “SWORD.” This will cause a series of numbers to appear in the bottom-left corner of the screen, and players can now use the work that they did previously to translate those numbers into letters, determine the Nurse Station Wall Safe code, and complete this Signalis puzzle.
Signalis is available for PC, PS4, Switch, and Xbox One.
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