Here is the full list of all 19 Divine Knockout (DKO) achievements.
Achieve 'Double KOs Gold'
Achieve 'Victorious Gold'
Achieve 'Resilient'
Achieve 'Divine Knock Out!'
Achieve 'Rebound'
Achieve 'KO Collection Silver'
Achieve 'KO Collection Gold'
Achieve 'Damage Dealer Silver'
Achieve 'Damage Dealer Gold'
Achieve 'Victorious Silver'
Achieve 'Destructive'
Achieve 'Traveler’s Tall Tale'
Achieve 'PvE'd'
Achieve 'The Penta-Ultimate'
Achieve 'Triple KOs Silver'
Achieve 'Triple KOs Gold'
Achieve 'Double KOs Silver'
Achieve 'Air-Time'
Achieve 'Practice Makes Perfect'