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