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