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