Go find all of the armor pieces in the game. Some are quite tricky to find. Then if you want the extra challenge, upgrade all of that armor to its max.

That it went missing due to the controller used. I find it utterly absurd to believe that a submarine of such high caliber could possibly go missing due to a low-grade Mad Catz controller. In my opinion, when you’re dealing with equipment as expensive and sophisticated as a submarine, you’d expect nothing but the most advanced and reliable controls, not some generic gaming joystick. It’s quite a far-fetched conspiracy theory if you ask me.