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