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