Here is the full list of all 41 Rumours From Elsewhere achievements worth 1,000 gamerscore.
Beat classic mode playing as the Highwayman
Beat classic mode playing as the Bride
Beat classic mode playing as the Vizier
Beat classic mode playing as the Falconer
Beat classic mode playing as the Executioner
Beat classic mode playing as the Necromancer
Beat classic mode playing as the Fortune Teller
Beat classic mode playing as the Foot Soldier
Beat classic mode playing as the Royal Guard
Beat classic mode playing as the Hierophant
Unlock a full character page in the Library
Unlock 50% of the Library
Unlock 100% of the Library
Forge 1 weapon or trinket
Complete 1 whole forge tree
Forge all weapons and trinkets
Beat classic mode with the Corrupted Seeker pet
Beat classic mode with every playable character
Accept the Babau's deal in classic mode
Enter the secret level in classic mode
Beat the classic mode in coop
Kill 666 skeletons in classic mode
Die 69 times in classic mode
Open 420 chests in classic mode
Get killed by the Babau in classic mode
Death by spike trap in classic mode
Kill 1 of each enemy type in classic mode
Visit each level once in classic mode
Beat classic mode with the Cursed weapon equipped
Die once in classic mode
Repulse the Babau with a trinket in classic mode
Get a hat from the Scavenger
1000th customer special at the Merchant's Tent
Drink 100 potions in classic mode
Drink 100 water in classic mode
Get banned from the Merchant's Tent
Collect a total of 1000000 gold in classic mode
Fall in a void in classic mode
Kill 100 Scavengers in classic mode
Kill 100 Genies in classic mode
Complete all achievements