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