Here is the full list of all 49 Metro 2033 Redux achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Find the truth.
Complete the level BLACK STATION without killing or knocking out any enemies.
Complete FRONTLINE level without killing anyone.
Kill at least one enemy with each weapon available in the game
Get 30 kills with Hellbreath.
Drink at every occasion.
Find all Ranger stashes in Dead City.
Complete all 51 of Artyom's hidden Diary pages.
Kill 20 lurkers.
Complete the game in Spartan Mode.
Kill 10 Spiders.
Kill 30 enemies with a flamethrower.
Kill a librarian.
On the level HUNTER kill the nosalises before they break through the ventilation grilles.
Kill 100 enemies using revolvers.
Explode 30 enemies.
Kill 30 enemies with flame grenades.
Kill 30 human enemies in close combat.
Knock 30 human enemies out in close combat.
On the level FRONTLINE kill all of the enemy Red Army and Fascist Soldiers.
Kill 30 enemies with throwing knives.
Use a Medkit 75 times.
Kill 15 human enemies with Headshots from at least 30 meters' distance.
Make 30 deals in weapon shops.
Save 1000 military-grade rounds.
Stealthily kill 15 Enemies.
Disarm 15 wire traps.
Kill 100 enemies with shotguns.
Kill 2 demons.
On the level OUTPOST reach the radio tower and broadcast the commander's message.
Exchange 500 Military-Grade 5.45 rounds at Exchange kiosks.
On the level DEPOT silently kill the first guard and break into the Fascist station unnoticed.
Open 15 locked safe boxes.
Kill 50 humans with pneumatic weapons.
Spend 60 seconds in a Radiation Hotspot.
Wipe your Gas Mask 20 times.
Help the poor, a coin for the kid, medicine for the sick. You help everyone you see.
Become a true ranger.
Complete the game in Survival Mode.
Kill 200 Mutants.
Kill 50 Watchmen.
Kill 5 amoebas.
Kill 10 Enemies in a row without taking any damage.
Kill 100 nosalises.
Kill 100 enemies with assault rifles.
Kill 100 Human Enemies.
Kill 30 human enemies with headshots.
Save a group of Reds from Fascist captivity.
Blow up the tunnel and airlock at CURSED STATION.