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