Assassin's Creed 4: Black Flag Walkthrough Part 77 – Present Day Epilogue Part 2
Head to the front of the building and go down the stairs. There are 2 terminals there with Data Spheres on them. The one to the West, has the solution: Up, Left, Down, Left, Up, Right, Down or Up. This will unlock “Subject 17 Memo 4”. You will also find Sticky Note #15 to the right of the terminal.
The one to the East will have another Data Sphere on it. The solution there is: Right, Up, Right, Up, Left, Down, Right, then either Up or Down. This will unlock: “CONFIDENTIAL – Chat Log”.
After that head into the elevator. Go on down to the Server level and go back to where they held you. There are 2 Computers here that can be hacked. The first one is in the Southwest, in Room 4. This one has Data Sphere on it. Its solution is: Up, Right, Down, Right, Up, Right,Up, Right, Down, Left, Down, Right, Up, Left, Down, Left then either Up or Down. This will unlock “Abstergo Pack”.
Head to the Northeast next, into Room 2. There you will find another Terminal. It also has a Data Sphere on it. The solution to this one is: Down, Left, Down, Left, Up, Left, Down then either Left or Right. This gives you “'Subject Zero' – Audio File 2”.
Head into the Animus. There is a brief sequence with Edward and Anne. There they part ways for now. Enjoy the credits and sailing with Edward and his daughter. After that just watch on through the credits to see everything with Edward's family. Complete this sequence to finish out the game properly and gain access to Melanie's computer and any other not yet accessible.
Melanie's Computer has been saved for last because of its proximity to the Animus Terminal. It has a Data Stream on it. Just make it through to unlock the final jewel: “Market Analysis: Aveline De Grandpre”.