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