Here is the full list of all 54 Starpoint Gemini Warlords achievements.
You've "backstabbed" the person with whom you're conversing during a certain main quest
Collect all Geminipedia entries
Have all planets under your control
Earn 1,000,000,000 credits
Collect all Artefacts
Conquer 50 Regions
Visit the old Landmark
Collect all Factions of Gemini entries
Collect all Ship Chassis of Gemini entries
Build all possible structures in all 15 regions
Capture a Destroyer Class ship after pillaging every room of that ship
Conquer 25 Regions
Let your Holo Decoy destroy 2 ships in 10 seconds
Accumulate 30 minutes of Cloak time
Destroy 4 ships with a single Precision Shot skill
Nuke an enemy Warmaster
Destroy 15 ships with a single Warhead skill
Delay activating the Proxima Beam for 60 seconds after it charges
Push away 200 targets with the Gravity Push skill
Emerge victorius from every battle in all Gladiatrix arenas
Pull 30 targets with a single Gravity Pull skill
Successfully Execute 10 ships in a row
Destroy 5 ships with a single Shotgun Skill
Overkill
Complete 70 research projects
"Liberate" your first planet
Disable enemy ships for a total duration of 30 minutes
Fin
Complete the "Farsight" mission
Complete the "Bon Voyage" mission
Construct the Proxima
Ram into a Wamaster who tried to use the Ram skill on You
Fully upgrade your HQ
Jump through a Wormhole
Construct the Hub Module Level 3
Destroy 10 ships with a single Expose skill
Finish 5 Faction Missions
Complete the "Jumping Jack Flash" mission
Complete the "BFG" mission
Complete the "Power to the Core" mission
Complete the "Hard Times" mission
Share your thoughts with the rest of the community
Collect all Anomalous anomalies entries
Complete the "Orphiel - Take Two" mission
Use T-Drive for the First Time
Take over Your 1st Region
Link/Hack your first satellite
Build your 1st module
Complete the "Defender of the Crown" mission
Complete the "Get Things Rolling" mission
Customize a ship
Emerge victorious from a battle with less then 5% hull points remaining
Finish the Prologue
Kill a Warmaster