Here is the full list of all 49 Metro: Last Light Redux achievements worth 1,000 gamerscore.
Destroyed D6.
Completed the game in Spartan Mode.
Made Moskvin tell the truth with help from the Dark One.
Killed Pavel.
Found out about the Reds' plans.
Killed the Rhino.
Killed 100 Mutants.
Found and returned the crying child's Teddy Bear.
Killed 100 Human Enemies.
Spent 30 minutes' worth of Filters.
Turned off 40 Lights without breaking them.
Used 10 Lever Switches.
Escaped from the Red Line.
Completed the ECHOES level undetected by the Watchmen.
Burned 50 Cobwebs.
Escaped the chasing Nazis on the REICH level without being caught once.
Freed the Prisoners.
Finished the ASHES level without taking a hit.
Completed training sequence.
Chosen three primary weapons that use different ammo.
See all Visions in the Dead City.
Rescue the Women and Children on the BANDITS level without raising alarm.
Kill all armed enemies on the REVOLUTION level, including all reinforcements.
Disarm 10 Traps.
Save the Bear from the Watchmen after the fight.
Complete the SEPARATION level without killing or raising alarm.
Complete the FACILITY level without killing or raising alarm.
Complete the REVOLUTION level without killing and raising an alarm.
Drink at every occasion.
Kill 10 enemies in a row with Throwing Knives.
Watch the entire Theater Show.
Complete all 43 of Artyom's hidden Diary pages.
Complete the BRIDGE level without a kill.
Save D6.
Remove your mask when Lesnitsky demands it.
Kill the Watchmen attacking the Railcar without taking any damage.
Stealthily kill 15 Enemies.
Make 10 Spiders flip belly-up.
Complete the game in Survival Mode.
Open 10 locked safe boxes.
Complete the SNIPER TEAM level.
Complete the KSHATRIYA level.
Complete the HEAVY SQUAD level.
Complete the TOWER level.
Complete the SPIDER LAIR level.
Spend 1 hour on the DEVELOPER level.
Complete the PAVEL level.
Complete the KHAN level.
Complete the ANNA level.