How to Get All Allies for the Finale
During the final chapter of Episode 05: The Vault of the Traveler, you are able to choose 3 allies to join you on your vault hunting team. The team members that you are able to choose will depend on the choices you made throughout the game.
You can unlock Athena in 2 ways. You could tell Springs that Athena loves her in Episode 04: Escape Plan Bravo, Chapter 02: Launch Preparations. However, you can also unlock her by not taking her shield in Episode 02: Atlas Mugged, Chapter 06: Bro or Bot.
You can unlock August when you consistently showed yourself to be a badass during your quest for the Vault. You can also unlock August by not blaming him for messing up the deal back in Episode 03: Catch a Ride, Chapter 02: Of Mobsters and Gladiators.
You can only unlock Cassius if you tried to stop Athena from killing him in Episode 03: Catch a Ride, Chapter 05: The Gortys Piece.
You can only unlock Felix if you warn him about the bomb in the case at the end of Episode 01: Zer0 Sum, Chapter 05: 2 Fast 2 Fiona.
You can unlock Springs if you pay tribute to Scooter in Episode 04: Escape Plan Bravo, Chapter 03: Voyage to Helios.
You can unlock Zero if you tell Mordecai that Fiona is a Vault Hunter in Episode 03: Catch a Ride, Chapter 06: Rumble in the Jungle. Then he will tell the other hunters that Fiona is a Vault Hunter and Zer0 will catch wind of that.
Unlock the Unknown
You can unlock REDACTED by being frugal! You need to spend as little money as possible on your journey. You can also leave Felix alive because when you select him on your team, he will leave you 9 million dollars. You can use that money to hire the Mysterious Vault Hunter
, aka Claptrap.