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