The First Biomarker quest has three riddles you will need to solve in order to learn the safe code, and this guide will help you crack all three riddles from Dr Katsumi's note.

The First Biomarker quest is one of the early game missions in Dying Light 2 which is given to you by McGregor in Houndfield.
The first biomarker is supposedly a device that can reveal to people if they will turn into the Infected or if they are safe, but apparently, it also has some desirable side effects that will come in handy during your parkour adventures through the city.

The aforementioned NPC, McGregor, claims that he invented this powerful device, but the problem is that he needs someone to bring it back to him, as it is located in Saint Joseph Hospital, which is not exactly the safest place in the city.

That's where you and your parkour prowess jump in, as we are going to help him. Coming and entering Saint Joseph Hospital will not be a particularly complicated task, but what has many people confused are the three riddles from Dr Katsumi's note, which hide a solution for the safe cod in the hospital.

In order to find out what is the answer for the First Biomarker safe code riddle in Dying Light 2, we will need to solve all three riddles from Dr Katsumi's note.

Each riddle will give you one digit for the code (for a three-digit code) in the same order they are presented in the note.

So, let's see the answers.

• Riddle #1 -"What becomes smaller when you turn it upside down?"

The correct answer here is nine (9) because when you flip it over it becomes the number six (6).

• Riddle #2 - "An odd number, take away a letter and it becomes even."

The answer is seven (7), because when we remove "s" what remains is the word "even".

• Riddle #3 - "A little girl goes to the store and buys one dozen eggs. As she is going home, all but three eggs break. How many eggs are left unbroken?"

The answer is simple, and it is already given in the riddle - "all but three eggs break" - which means that the final digit is three (3) since a dozen is six.