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