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