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