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