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