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