In 1959, nine skiers in the Soviet Union went missing on a planned hike up the Otorten Mountain. Over the next several months, their bodies were found. They were separated into two groups, and all had unexplainable injuries.
There's a lot about the case of the Dyatlov Pass Incident that people can't quite explain. But that hasn't stopped some from coming up with their own theories. Secret Soviet weapons tests, aliens, a Yeti, or killer local tribes.
Kholat, a horror game by Polish developer IMGN.PRO is loosely based on the Dyatlov Pass Incident, asking what happened to those skiers, looking at Soviet culture, and putting forward its own theory. It's also kinda bad. Also, there's Batman and Sean Bean.