Full list of all 50 Paladin's Oath achievements.
The base game contains 40 achievements, and there are 2 DLC packs containing 10 achievements.
You completed the Epic Conquest scenario with only Day Rounds
You completed the Epic Conquest scenario with only Night Rounds
You completed the Last Bastion scenario with only Day Rounds
You completed the Last Bastion scenario with only Night Rounds
You completed the Holy War scenario with only Day Rounds
You completed the Holy War scenario with only Night Rounds
You completed the Rise of the Ancients scenario with any Oath
You completed the Rise of the Ancients scenario with the Piety Oath
You completed the Rise of the Ancients scenario with only Day Rounds
You completed the Rise of the Ancients scenario with only Night Rounds