The game is 100% completed.
The game is completed in survival mode
At the end, you are given a choice of 2 game outcomes
All of Artemka's diaries are collected
The game is completed on difficulty: Normal
Instructions for installing the file:

Unzip the archive to the path: C:\Users\[user name]\Documents\4A Games\Metro 2033\
Replace the files in the folder
Enjoy the game

Author: MasikTob