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