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