Here is the full list of all 16 Sabres of Infinity achievements.
You have obtained a knighthood.
Meet one officer from each of Tierra's five duchies.
You rode at the head of a desperate charge in a great battle.
Be decorated for your deeds in battle.
Complete the story with a character above the age of 30.
You bluffed a superior force into surrendering without a fight.
You died a heroic death in a great battle.
You defended a seemingly hopeless position in a great battle.
You chose to relieve yourself of your duties after an act of grave dishonour.
You were murdered by your own subordinates.
You employed hand grenades in an attack.
You exposed the atrocities of a fellow Tierran officer.
You completed the story with high idealism and high ruthlessness.
You completed the story with high cynicism and high mercy.
Win every decoration.
Win every decoration in a single playthrough and end the story with a high reputation.