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