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