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