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