Here is the full list of all 20 35MM achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Die
Reach the finals with a partner
Reach the finals alone
Open the safe in the city
Listen to the radio signal in tunnels
Find the secret documents in the safe
Find "easter egg" from the first game of author
Call to Hell
Help to grandfather in town
Listen the airwaves in the hospital
Kill all dogs without reloading weapons
Find a room with mannequins in city
Light a candles in an abandoned church
Kill grandmother in the old village
Find the bodyes of hanged people over the railway
Rate the abstract picture on location "Bor"
Find anomalous zone in the tunnels
Give your partner a first aid kit
Assemble the children's puzzle
Listen the sound anomaly at the first location