Here is the full list of all 19 Divine Knockout (DKO) achievements.
Achieve 'Double KOs Silver'
Achieve 'Resilient'
Achieve 'Air-Time'
Achieve 'Triple KOs Silver'
Achieve 'Triple KOs Gold'
Achieve 'Double KOs Gold'
Achieve 'Victorious Gold'
Achieve 'The Penta-Ultimate'
Achieve 'Rebound'
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 'Practice Makes Perfect'