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