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