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