Most of the bosses you fight throughout Chapter 3 of the Armored Core 6 campaign are mechs like you, but one of the big exceptions to that is the PCA's deadly CATAPHRACT vehicle. This heavy supertank is extremely resilient and capable of dishing out tons of damage, yet is also quite agile. This makes it one of the tougher bosses you'll encounter at this stage of the game.
With that said, the CATAPHRACT is far from unbeatable, and if you challenge it with a good Armored Core build and apply the right tactics, you shouldn't have too much trouble taking it out. Here's a full guide on everything you need to know about the fight with it, including which types of loadouts work best, how to avoid its attacks, what you'll need to do to counter it, and more.
