Here is the full list of all 12 #IDARB achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
Score a fifteen point shot
Get an Alley Oop
Win a game with the final score of ‘42’
Stun online opponents 25 or more times
Create 10 or more customized teams, each with 8+ characters, a custom logo, and a custom song.
Create 20 or more characters in the character creator
Import 10 or more characters via Trading Post or QR code into the game
Import 10 or more songs via Trading Post or QR code into the game
Create 20 or more logos in the Logo Creator
Import 10 or more logos via Trading Post or QR code into the game
Create 20 or more songs in the song creator
Summon the Achievement Bot.