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