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