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