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