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