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 unlocked all safe spots.
You've collected all journal pages.
You've collected all articles.
You've collected all reports.
You've explored the cave.
You've reached the tent.
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 throne area.
You've collected a note in the cave area.
You've collected a note in the church area.
You've collected a note in the radar station area.
You've lost the chase.
You've collected a note in the altar area.
You've collected a note in the hunters cabin area.
You've encountered the anomaly.
You've collected a note in the circle area.
You've unlocked the incident in the bunker.
You've survived!