Here is the full list of all 10 ABO MANDO achievements.
FINISH THE GAME
DEFEAT THE BLACK CHARRO
DEFEAT TO THE NAHUAL
DEFEAT THE GRIM REAPER
GET 5 PUMPKINS
DEFEAT THE WEEPING WOMAN
DISCOVER A GLITCH ROOM
GET ALL GOLD OF THE UNDERWORLD
GET 70 COINS
GET 5 TRINKETS IN THE CRYPT