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