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