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