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