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