This map is not part of Half-life world. It's about zombie apocalypse in the post-soviet country. Gameplay was inspired by survival-horrors like RE2, Evil Within. Level design was inspired by Dark Souls.
Additional link - Drive.google.com
0. Download map(bsp file) and put it in Half-Life 2\hl2\maps.
1. Enable console in Half-Life 2 settings. options >> keyboard >> advanced >> enable developer's console.
2. Open console by "~" button.
3. Write in console: map escape_level
4. Then the map should load, and you will be able to play.
If flashlight does not work
At some point of a map your flashlight will stop working, but it's fine, just part of a gameplay. But if you decide to leave while playing a segment with disabled flashlight or want to load a save before flashlight should be disabled, it won't start working. If such situation happened just write this command in console: r_flashlightrender 1 At the end of the level, flashlight will turn on, so don't worry.