Here is the full list of all 19 Symphony of War: The Nephilim Saga achievements.
Complete the main story on Warlord difficulty.
Complete the main story on Captain difficulty.
Surrender all the Imperial Squads in Chapter 27.
Reach Max Faction Rank.
Unlock all Techs in a single playthrough.
Surrender 200 enemy Units in a single playthrough.
Army size reaches 150 Units.
Form a Bond relationship.
Have 9 Units in one Squad.
Rescue all 4 children in Chapter 15.
Reach Faction Rank 9.
Defeat all enemies in Chapter 12.
Defeat Beatrix in Chapter 11.
Use a Proof of Merit on a Unit.
Class change to Tier 3.
Hire a Unique Mercenary.
Find or purchase an Artifact of Legendary rarity.
Class change to Tier 2.
Reach Faction Rank 4.