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