Letter box

There is multiple locations throughout the game where a 12x28 grid that resembles a word search puzzle can be found, this is the letter box.

The letter box code is solved by using the coordinates found on the three top rows. Each coordinate consists of an X, Y and three numbers.

Clues

Solution

The first number after the two letters indicates the number of the decoded letter in the current word. The second and the third number indicates the X and Y coordinates of the letter in the letter box and which number is used for which coordinate.

Example: XY134 is decoded as follows:

• (XY) Indicate that we use the second number for the X coordinate and third for the Y coordinate.
• (1) It's the first letter in the word.
• (3) It's third letter in the row.
• (4) It's on row G4.

Using all this we get the letter "R"

Following this method the following words can be decoded:

• G1 = Right
• G2 = Person (Missing letter "R")
• G3 = Tell

These words are used in the body message.

Zuntti confirmed this by releasing a key to the puzzle with the filename "not_related_R_RED_G_GREEN_ON_OFF_LIGHTS".

Outliers

• The third letter in G1 has switched X and Y coordinates, requiring the numbers to be reversed to find the coordinate position of the letter.

• Zuntti's signature is on the "YT" row, starting at the 5th column.

• "G4", containing the only number past the first three row, what it corresponds to, and its connection to the body message is unknown. Alternatively, if one were to read it as "SONG4", it might refer to strange_hallway_004.wav. Looking at a spectrogram shows that there might be text on it, but it's hard to see what the text actually is.