Here is the full list of all 71 Golden Light achievements.
Kill 500 monsters total
Save her
Destroy 50 walls total
Kill Castle directly
Kill Maneater directly
Buy a key from Golden Eye Taker
Kill Gut Divers directly
Kill a monster with a Shotgun
Kill a monster with a Vein Whip
Kill Meall directly
Complete any floor without using your weapons once
Make 200 gold
Eat a fire item
Kill an Eyetaker with Meat Spear
Buy a key from Pile of Meat
Kill Needles directly
Kill anyone with your Huge Chin
Complete 20 floors total
Find 3 Golden Meats total
Kill 100 monsters total
Put your hands into the talking toilet
Complete 5 floors without dying
Kill Carre directly
Collect 25 keys total
Destroy a wall by eating an item
Find your first Golden Meat
Kill Eye Taker
Kill a monster with a Revolver
Make 100 gold
Kill a monster with a Tommygun
Eat a poisoned item
Read a special note
Burn a monster to death
Complete 3 floors total
Die
Kill a monster with a Pipe
Kill a monster with a Map
Kill a monster with a pistol
Kill a monster with an Axe
Lose an eye
Make 500 gold
Make 1000 gold
Throw 500 gold at Son
Find a multy barrel shotgun
Finish any floor without taking damage
Bring a rose to Val
Collect Marv, Third Lung and Pulp mementos in one run
Complete 50 floors total
Complete 100 floors total
Kill your Meat Bro in Co-op while having Traitorous Bastard memento.
The Gut hates you
Collect Huge Chin and Nose with Teeth mementos in one run
Ressurect your Meat Bro in Co-op
Complete 1 floor in Co-op
Complete 20 floors without dying
Meet Rose for the first time
Complete 500 floors total
Kill 1000 monsters total
Kill She in the flashback
Enter the White Room on Meat War
Enter the Field Room on Meat War
Enter the Torture Room on Meat War
Enter the Murder Room on Meat War
Enter the White Room on MEATZONE
Enter the Field Room on MEATZONE
Enter the Torture Room on MEATZONE
Enter the Murder Room on MEATZONE
Get every memento and open the final door
Enter the Val Room
Enter the Val Room on Meat Zone
Kill Scourge directly