Here is the full list of all 20 Kholat achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
You've unlocked the real ending.
You've reached the tent.
You've survived!
You've collected all reports.
You've unlocked all safe spots.
You've collected a note in the throne area.
You've collected all journal pages.
You've collected all articles.
You've explored the cave.
You've collected a note in the cave area.
You've collected a note in the burned forest area.
You've collected a note in the tree area.
You've collected a note in the hunters cabin area.
You've collected a note in the altar area.
You've collected a note in the radar station area.
You've unlocked the incident in the bunker.
You've collected a note in the church area.
You've lost the chase.
You've encountered the anomaly.
You've collected a note in the circle area.