Metro-2: Project Kollie is an immersive action-adventure that combines the mechanics of a puzzle game with the story of a spy. It is the first game to be developed with the Unity Engine.

You will have to play the role of a secret agent in order to complete your missions. Your enemies are the doctors and scientists who worked on the project and the soldiers who are guarding the site.

Your task is to get to the bottom of the story and learn the secrets of this project. The story will be presented to you in the form of a narrative and an interactive world. The world is full of puzzles, secrets, and mysteries.