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