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