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