SPOILERS ALERT

1. Check out the main menu and you can notice some funny things in the near-Earth space: ISS astronaut’s glove or Ivan’s katana, for example.

2. Someone killed the guard and wrote with his blood Enbaku symbol on the wall of the elevator.

3. Ivan became a legendary ghost in the Guantanamo walls.

4. Ivan was blinded and infected after imprisonment. Whole operation was under Caraway’s control (?).

5. Ivan very very naughty here:

6. Smoking trashcans is almost personal Russian phenomenon, when people drop the unquenched cigarettes into them.

7. After beating Grundla Saha, Ivan gives him his weapon. “Chosen by Odin who died in combat travel to Valhalla upon death”.

8. Vaccine was tested on the mouses, rabbits, dogs, monkeys and gorillas.

9. In the labs the researchers tested vaccine on both Russian and Japanese people too. Isaac Kumano, Ivan and Ludmilla Karenina weren’t in the list. There are unknown Rudolf Grossman instead, who can be Guinea Pig or Sovershennyy. According to the documents, all of them are "Genetic modified organisms".

10. Lenin’ statue and Dr. Maeda’ statue in the same poses.

11. You can notice local mountain’s sketch on the wall.

12. Chapter 5 full of Japanese animal symbols. They are also in Splatoon’s Inknopolis.

13. When Ivan blinded Jane Doe, he gave her a chance for redemption. “Meet darkness. It's where you'll find the true light”.

14. On the square in front of the cosmodrome you can notice Yuri Gagarin’s statue. “Sovershennyy” translated from Russian like “perfect man”, and this monster overthrew Gagarin from the pedestal. Sovershennyy is actually have four hands.

15. Whole "School of Democracy" group kinda reminder the Metal Gear Units (Cobra, Dead Cell, Fox Hound, B&B, etc).

16. Ludmilla’s second name refers to Anna Karenina, a fictional character. She calls herself as “Angel of Death”, what is obviously reference to Dr. Mengele.