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