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