Here is the full list of all 14 Solbane achievements.
Survive against Archangel.
Defeat Hive.
Defeat the first boss, Ruin.
Get rid of Godsbane.
Shatter the Anvil.
Defeat Flashguard.
Complete Act 1.
Defeat Cerberus.
Siege the Fortress.
Defeat the Eclipse tandem.
Complete Act 2.
Defeat Aggressor Mark II.
Solve the Enigma Drone.
Complete the Campaign.