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