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