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