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.
Saved the Bear from the Watchmen after the fight.
Killed Pavel.
Saw all Visions in the Dead City.
Found out about the Reds' plans.
Removed your mask when Lesnitsky demanded.
Killed the Rhino.
Turned off 40 Lights without breaking them.
Killed 100 Mutants.
Drank at every occasion.
Spent 30 minutes' worth of Filters.
Killed 100 Human Enemies.
Escaped from the Red Line.
Watched the entire Theater Show.
Completed the ECHOES level undetected by the Watchmen.
Used 10 Lever Switches.
Burned 50 Cobwebs.
Made 10 Spiders flip belly-up.
Stealthily killed 15 Enemies.
Killed 10 enemies in a row with Throwing Knives.
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.
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.
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.
Complete all 43 of Artyom's hidden Diary pages.
Complete the BRIDGE level without a kill.
Save D6.
Find and return the crying child's Teddy Bear.
Kill the Watchmen attacking the Railcar without taking any damage.
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.