The Moxxi's Heist of the Handsome Jackpot Add-on for Borderlands 3 has 7 achievements worth 255 gamerscore.
Complete mission "All Bets Off".
Sabotage all statues for Ember.
Complete the Mayor's outfit.
Destroy all of Mr. Torgue's hot sauces.
Get a 21 in the blackjack minigame.
Return for a chat with the Clapstructor.
Defeat the wandering Debt Collector.