Legacy’s End is a Crimson Fleet mission available in Starfield.
Your objective is to aid the UC Vigilance in destroying the Crimson Fleet (assuming you chose the UC).
Here’s a walkthrough and guide of Legacy’s End in Starfield.
Destroy Defensive Battery Alpha, Beta and Gamma
The main objective now is to destroy Defensive Battery Alpha, Beta and Gamma that are on different sides of the planet’s orbit.
You’ll need to destroy Alpha first. There’ll also be ships supporting the Battery. Take them all down.
When you’re done, travel to Defensive Battery Beta.
Like before, destroy the Crimson Fleet ships and Defensive Battery Beta.
Repeat the process for Defensive Battery Gamma.
Join the battle at The Key
This is probably the toughest space battle in the game so far. You may want to upgrade your ship as good as possible.
Also, stock up on your ship parts for repairs.
When you arrive at The Key, you’ll notice that UC Vigilance isn’t here and you have to battle tons of ships. Some of the ships belong to NPCs you helped in previous Crimson Fleet missions like the Jade Swan ship.
After defeating most of the ships, UC Vigilance will arrive. Board The Key.
Defeat the rest of the Crimson Fleet
Enter The Key and kill all of the pirates.
Make your way to the Operations Center.
More pirates await including Jazz. Take them down.
Use Jasmine’s computer to open the next door.
Continue ahead to the merchant area and you’ll need to kill them all.
You should also stumble upon pirates like Rokov and Mathis from previous missions if you had helped them, which makes it feel worse.
Go to the Last Nova
Open the Last Nova’s doors after clearing the area.
Use the Last Nova’s computer to open the doors.
Speak to Shinya Voss
Proceed ahead and you’ll meet Shinya Voss.
You can still choose to deactivate the bomb on his chest. He’ll allow you to.
This one has to be done later after you reach Delgado.
Reach the Operations Center
Continue ahead to the Operations Center.
Talk to Delgado through the window.
You can still persuade him to prevent the ship from exploding.
(Optional) Deactivate Shinya Voss’ bomb
After convincing Delgado not to do anything, enter his office and look for his computer.
Use the computer to disarm Shinya Voss’ bomb.
You can talk to him later and he’ll ask you to tell the Commander that he goes peacefully.
Return to UC Vigilance
Now that you’re done, head back to UC Vigilance to talk to Commander Ikande.
The mission ends here. You’ll get 250000 credits and a SysDef Formal Uniform.