Here is the full list of all 33 X3: Terran Conflict achievements.
Visit all sectors. Unfocused jumps don't count.
Reactivate the final set of Hub gates.
Acquire your personal Headquarters.
Finish the Balance of Power mission.
Complete the Aldrin Missions.
Complete Operation Final Fury.
Complete the New Home Missions.
Destroy 1,000 Kha'ak and/or Xenon ships.
Get one billion Credits in your account.
Mine ten units of Nividium.
Train five marines to five stars.
Complete the Treasure Hunt Campaign.
Achieve the highest reputation with the main races.
Build a complex with five factories.
Help the Goner to rebuild and relocate their Temple.
Earn 100,000 Credits with a police license.
Reunite the Aldrin colony with Earth.
Force a pilot to eject a crate worth over 10,000 Credits.
Achieve fight rank Professional.
Claim ten ships.
Achieve trade rank Wholesaler.
Build a factory.
Pass the Flight School.
Achieve trade rank X-TREME.
Achieve fight rank X-TREME.
Stun seven space flies at once.
Board and take over ten capital ships.
Board and take over a Xenon Q.
Finish three campaigns in Dead-is-Dead mode.
Finish six campaigns in Dead-is-Dead mode.
Finish nine campaigns in Dead-is-Dead mode.
Destroy 20 ships with the Plasma Burst Generator.
Destroy a Solar Power Plant.