Here is the full list of all 20 35MM achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox One.
Listen to the sound anomaly at the first location
Light candles in an abandoned church
Kill grandmother in the old village
Help the grandfather in town (faster than your partner)
Unexpected find
Rate the abstract picture on the "Bor" location
Find "easter egg" from the first game of author
Find secret documents in the safe (at the Bor location)
Listen to the radio signal in tunnels
Find anomalous zone in the tunnels
Give your partner a first aid kit
Kill all wolves without reloading weapons
Call to Hell
Open the safe in the Big City
Find a room with mannequins in the Big City
Died sitting at the table
Reach the finals alone
Reach the finals with a partner
Listen to the airwaves in the hospital
Assemble the children's puzzle