Here is the full list of all 30 Ancient Space achievements.
Complete the campaign.
Destroy FTL blockades without losing more than 4 alien units in Mission 14.
In mission 13, capture 3 units, destroy 3 enemy units and destroy 3 enemy buildings - all within 5 minutes.
Secure all stations in a single mission.
Have at least 7 XL units in a single mission.
Find out what happened to the previous expedition. Complete Mission 10.
Command at least one Mk.2 unit of each unit type.
In Mission 7, complete the optional objective without ever picking up the target object.
Reach the Katarina with Corsairs in under 8 minutes in Mission 7.
Do not lose any units to invisible attackers in Mission 6.
Build each of the available building types.
Venture deeper into the Zone. Complete Mission 5.
Destroy an enemy Station with another building.
Destroy at least 30 units in a single mission using the Olympus.
Assemble the fleet for the expedition. Complete Mission 1.
Perform an optional objective.
In mission 1, at least two of your assigned cargo ships must survive until they reach Sector 2.
Make 130 Discoveries.
Board a secured station.
Complete the campaign in under 8 hours of total mission time.
In mission 10, do not reinforce any building slots (you can board them though).
Complete Mission 15 producing only small units.
Complete Mission 11 with the forcefield generator losing no more than 25% of its hit points.
Board a Kraken in Mission 12.
Board at least 5 XL enemy units in Mission 13.
Find all Discoveries in a single mission from 2 to 15.
Complete a mission deploying only a single corsair and no other units.
Construct a self-defending, self-repairing, self-protecting, enemy-detecting and enemy-attacking group of buildings.
Complete the campaign in Hardcore Mode.
Use the ability of every officer at least once during a single campaign.