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 survived!
You've encountered the anomaly.
You've unlocked the real ending.
You've reached the tent.
You've collected a note in the burned forest area.
You've collected all articles.
You've collected all journal pages.
You've collected all reports.
You've unlocked all safe spots.
You've collected a note in the throne area.
You've explored the cave.
You've collected a note in the cave area.
You've collected a note in the hunters cabin 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 tree area.
You've collected a note in the altar area.
You've lost the chase.
You've collected a note in the church area.
You've collected a note in the circle area.