There was a story going around among stalkers about ten artifacts buried in a secret bunker and a collector who was ready to pay a large sum of money for these artifacts

and finally you managed to find this bunker, but as soon as you entered it, it turned out that someone stole all the spare batteries, and the flashlight charge will not last long, the timer will show how much charge is left...

This is a first-person walker, you need to collect objects, look for keys, but time is limited