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