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