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