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