Here is the full list of all 49 Metro: Last Light Redux achievements worth 1,000 gamerscore.
Completed the KSHATRIYA level.
Completed the SNIPER TEAM level.
Removed your mask when Lesnitsky demanded.
Freed the Prisoners.
Finished the ASHES level without taking a hit.
Drank at every occasion.
Completed the PAVEL level.
Completed the KHAN level.
Completed the SPIDER LAIR level.
Disarmed 10 Traps.
Completed the HEAVY SQUAD level.
Spent 1 hour on the DEVELOPER level.
Completed the ANNA level.
Destroyed D6.
Completed the game in Survival 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.
Opened 10 locked safe boxes.
Killed the Rhino.
Killed 10 enemies in a row with Throwing Knives.
Found and returned the crying child's Teddy Bear.
Killed 100 Mutants.
Spent 30 minutes' worth of Filters.
Made 10 Spiders flip belly-up.
Killed 100 Human Enemies.
Stealthily killed 15 Enemies.
Turned off 40 Lights without breaking them.
Escaped from the Red Line.
Watched the entire Theater Show.
Burned 50 Cobwebs.
Used 10 Lever Switches.
Escaped the chasing Nazis on the REICH level without being caught once.
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.
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 the ECHOES level undetected by the Watchmen.
Complete all 43 of Artyom's hidden Diary pages.
Complete the BRIDGE level without a kill.
Save D6.
Kill the Watchmen attacking the Railcar without taking any damage.
Complete the game in Spartan Mode.
Complete the TOWER level.