Here is the full list of all 49 Metro: Last Light Redux achievements worth 1,000 gamerscore.
Found out about the Reds' plans.
Stealthily killed 15 Enemies.
Disarmed 10 Traps.
Completed the BRIDGE level without a kill.
Removed your mask when Lesnitsky demanded.
Killed the Rhino.
Killed 100 Mutants.
Found and returned the crying child's Teddy Bear.
Drank at every occasion.
Rescued the Women and Children on the BANDITS level without raising alarm.
Spent 30 minutes' worth of Filters.
Made 10 Spiders flip belly-up.
Completed the REVOLUTION level without killing and raising an alarm.
Opened 10 locked safe boxes.
Turned off 40 Lights without breaking them.
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.
Completed the FACILITY level without killing or raising alarm.
Completed the SEPARATION level without killing or raising alarm.
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.
Destroy D6.
Kill all armed enemies on the REVOLUTION level, including all reinforcements.
Save the Bear from the Watchmen after the fight.
Kill 10 enemies in a row with Throwing Knives.
Complete all 43 of Artyom's hidden Diary pages.
Save D6.
Kill Pavel.
Kill the Watchmen attacking the Railcar without taking any damage.
Kill 100 Human Enemies.
Complete the game in Survival Mode.
Complete the game in Spartan Mode.
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.
Make Moskvin tell the truth with help from the Dark One.