DYSMANTLE

Once you reach the prison and have found the key to unlock the door inside, make you way to the training yard to see a deactivated mech where you'd need to extract a fuel cell. Once you interact with it. You'll have a fight on your hands.

First phase of the fight, make sure to lock on and strafe around it, avoiding its plasma blobs it fires at you and its stomp attack. Hit it with your melee weapon when you can. Don't be afraid to back off and take a breather.

Second phase, you'll want to use throwing knives. Yes. You read that right. They don't do a great deal of damage, but with its rockets that it spews out, you're not going to get close. You will have 3 orbs with +1 inside them. Teshese will refill your throwing knives. So just keep on collecting and throwing them and eventually the mech will be destroyed.