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