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