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