Here is the full list of all 24 Star Hammer: The Vanguard Prophecy achievements.
Recruit the intelligence officer
Have a reinforcement join you in battle
Deploy 30 countermeasures
Kill a stunned enemy with the Destroyer's laser
Keep your crew friendly
Recruit the science officer
Destroy 100 nautilids
Uncover the Remnant conspiracy
Recruit the pilot
Destroy 25 Remnant ships
Stun an enemy
Recruit the comms officer
Destroy a Nautilid in Campaign
Deploy a strike group with maximum Command Points
Destroy a Renmant in Campaign
Destroy an enemy with a missile
Destroy an enemy with a laser beam
Recruit the engineer
Protect Novus on your own terms
Protect the shipbuilding yards
Evacuate civilians from the Boardwalk
Evacuate workers from DM3
Don't lose a single escort during the war
Win a skirmish battle