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