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