For those that don't understand the code during the Outbreak Prime quest it's binary. I personally learned to read it as each place is worth a certain amount. And you always start at the right. This way you don't have to worry about 2x. Some people might find that method easy. Others will not so this is an alternative. 0 | 0 | 0 | 0 8 | 4 | 2 | 1 If there is a "0" in your code do not add the value of that place. So using this chart above you can work out what your code means by adding the value corresponding to the place of your code. 0101 = 4+1 = 5 0100 = 4 0011 =2+1 = 3 0010 = 2 0001 = 1 0000 = 0 Everyone learns differently so if this still confuses you you might want to use a converter online. Hope this helps some of you Guardians that may not be math inclined and don't want to use a converter to help you out with this.