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