Here is the full list of all 10 Star Trek Timelines achievements.
Ended lawlessness in Bajoran and Cardassian space and handed control to a single faction.
Ensured the supremacy of the Augments or the Klingons as the galaxy’s strongest warriors.
Gave the Grand Nagus seat to Rom and his progressive Alliance, or Brunt and his Traditionalist followers.
It's time to earn your place in Starfleet!
Defeated Regent Worf and drove the Klingon-Cardassian Alliance from Vulcan.
Witnessed the devastating effects of the temporal anomaly crisis.
Put the future of the Federation in either Section 31 or the Terran Empire’s hands.
Gave control of the Romulan Star Empire to Sela and the reluctant Romulans, or Shinzon and the victorious Klingon-Cardassian Alliance.
With approval (or disapproval) from the Xindi, allowed the Dominion to be hunted to near-extinction, or ended the Hirogen hunt.
Become Q's right-hand Captain in the galaxy.