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