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