This group of achievements relate to the five companions originally available to Sith Warrior characters. There are 195 legacy points spread between 13 achievements in 5 subsections. Most of these are relatively easy so long as you play with all your companions throughout the story.
5 Legacy Points | 20 Legacy Points
These achievements are unlocked for killing any combination of 100 and 1,000 enemies with Vette. These kills count if you recruit the companion during the Knights of the Fallen Empire expansion, or from playing the Sith Warrior story.
5 Legacy Points | 20 Legacy Points
These achievements are unlocked for killing any combination of 100 and 1,000 enemies with Broonmark. These kills count if you recruit the companion during the Knights of the Fallen Empire expansion, or from playing the Sith Warrior story.
10 Legacy Points
This achievement is unlocked for recruiting Broonmark on any character from the Alliance Alert Mission, The Last of His Kind. You can only recruit Broonmark after recruiting Yunn. . The mission needed to complete this is;
The Last of His Kind
50 Legacy Points
This is a hidden achievement
This achievement is unlocked for killing Xalek at the end of The Last of His Kind. Note you must still complete the mission on Alderaan before being forced to kill Broonmark. The mission needed to complete this is;
The Last of His Kind
5 Legacy Points | 20 Legacy Points
These achievements are unlocked for killing any combination of 100 and 1,000 enemies with Jaesa. These kills count if you recruit the companion during the Jedi Under Siege expansion, or from playing the Sith Warrior story.
5 Legacy Points | 20 Legacy Points
These achievements are unlocked for killing any combination of 100 and 1,000 enemies with Pierce. These kills count if you recruit the companion during the Knights of the Fallen Empire expansion, or from playing the Sith Warrior story.
10 Legacy Points
This achievement is unlocked for recruiting Pierce on any Imperial character from the Alliance Alert Mission, The Forgotten Trophy. You can only recruit Pierce after recruiting Yunn. The mission needed to complete this is;
The Forgotten Trophy
5 Legacy Points | 20 Legacy Points
These achievements are unlocked for killing any combination of 100 and 1,000 enemies with Quinn. These kills count if you recruit the companion during the Knights of the Eternal Throne expansion, or from playing the Sith Warrior story.