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