Make a 3×5 grid

You can see the word Khaos in the middle but the prefix and suffix are off. Reverse rows 2 & 4

Read going down from the upper left A

asw49chaos687vq

~ seems to be a split point

^^^^^^^^ vvvvv ^^^^ vvvvvv ^^^^^^ ^^ vvvv vvv ^^^ ^ v > > vvv ^^^ ^ > ^ > ^^

We have 20 groups, that’s good for 10 characters if we use them in pairs. This is a counting game, ^= count up v=count down >=same number

Group the results and make pairs

83 71 79 52 56 55 52 56 67 79

Convert decimal to Ascii

SGO48748CO

They used signs to make up the code

sgo48signs748co

Let’s make pairs to see what we are working with

97 77 76 aa ac 7f 7a 6f 6f 89 96 a9 a9 af 77 6f

All pairs where the numbers should fall start with A

This is hex Atbash, use the table to convert

0123456789abcdef
fedcba9876543210

68 88 89 55 53 80 85 90 90 76 69 56 56 50 88 90

Convert decimal to Ascii

DXY75PUZZLE882XZ