Here is the full list of all 15 Kholat trophies - there are 13 bronze, 1 silver and 1 gold.
You've survived!
You've unlocked the incident in the bunker
You've unlocked the real ending
You've reached the tent
You've collected a note in the burned forest area
You've explored the cave
You've unlocked all safe spots
You've collected a note in the cave area
You've collected a note in the throne area
You've collected a note in the hunters cabin area
You've collected a note in the church area
You've collected a note in the radar station area
You've collected a note in the circle area
You've collected a note in the tree area
You've collected a note in the altar area