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