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