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