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