Borderlands 3

Story related, can't be missed
 
This trophy will pop during the climactic cutscene at the end of the mission "All Bets Off". Note: The February 20th, 2020 Hot Fix has made the "Freddie the Traitor" fight a lot harder but also buggier, especially if you use the Recursion Shotgun so avoid using the weapon until after the fight is over.

Boss 1: Fought during the "Jacks Wild" mission.

Boss details:

Fabricator:

The Fabricator has the following attacks:

Shock Orb
Loader Spawn
Lasers
Missiles
Shockwave

The Fabricator is a complete joke to kill so use a strong Shock weapon to destroy its shields, then switch to a Corrosive weapon to finish him off. None of its attacks are especially dangerous, just keep an eye on the Loaders and pick them off if they get too close. The Fabricator's weakspots are the red lights in the dead centre of its body but they will be immune to damage whilst it's preparing to launch its missiles.


Boss 2: Fought during the "All Bets Off" mission.

Boss details:

Freddie the Traitor:

Freddie the Traitor has the following attacks:

Pump Action Shotgun
Loaders

Keep your distance from Freddie the Traitor and his Loaders "Dandelion" and "Petunia", whilst you lay into them, else you will take a lot of damage from the loaders. Freddie is vulnerable to Shock and Fire but "Dandelion" and "Petunia" are vulnerable to Corrosive. Glitch Note: Avoid using the Recursion Shotgun during this fight, else there's a chance that Freddie will fall through the floor and out of the game so can't be killed.


Boss 3: Fought during the "All Bets Off" mission.

Boss details:

Jackpot:

Jackpot has the following attacks:

Lasers
Rockets
Plasma Rockets
Charged Punch
Charged Kick
Charged Jump
Loader spawn
Fire Tornado + Lasers
Flamethrower

For Phases 1-3 you will need a strong Corrosive weapon to whittle down Jackpot's health and take care of the loaders he spawns but for Phase 4 you will need a fire weapon of some description. Jackpot's weakspots are his hands and the red Triangle that appears on his Chest during Phases 3 and 4.

Phase 1: This phase is simple enough, just avoid Jackpot's Lasers, Rockets, Loaders and Charged attacks whilst you whittle away his health. Once his health goes down to zero, he will become immune for a few seconds whilst his health recharges but in the meantime some Loaders will spawn so take care of them before his health comes back. Glitch Note: This phase can bug out whilst Jackpot is immune and cause him to never continue the fight. If this happens to you, your only option is reload your save and try again. Playing in co-op seems to make this glitch happen slightly more often so play by yourself to reduce the chances of it happening.

Phase 2: This phase is a little more complicated due to Jackpot focusing more on his Flamethrower, Plasma Rockets and Charged attacks but there's still nothing you can't easily avoid. At the end of this phase, he will go immune again for a few seconds to recharge his health and summon more loaders whilst he at it so clean them out and prepare for the next phase.

Phase 3: This phase is more dangerous than the others, because Jackpot will start using his Fire Tornado + Lasers attack which is very difficult to avoid so stay on the perimeter of the arena and keep moving. If you do take major damage, open some chests and grab any health you find within. At the end of this phase, he will go immune again for a few seconds to recharge his health and summon more loaders whilst he at it so clean them out and prepare for the final phase.

Phase 4: This the most dangerous phase of the fight, because Jackpot will use nothing but his Charged attacks - all of which are difficult to avoid so try to dodge them as best you can whilst chipping away at his health.